CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36
The structure of Pr3Co2Ge7.36 (Cmmm, a = 4.236 (1), b = 25.994(5), c = 4.272(1) Å, Z = 2) can be considered as a partly disordered derivative of the La3Co2Sn7 type. The Ge positions in the Pr4Ge8 cuboctahedra of the AuCu3-type slabs are conveniently described by two partly occupied sites, one of whi...
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| Date: | 2022 |
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2022
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Ukrainian Chemistry Journal| _version_ | 1871465878324772864 |
|---|---|
| author | Belan, Bohdana Dzevenko, Mariya Stępień-Damm, Julia Gladyshevskii, Roman |
| author_facet | Belan, Bohdana Dzevenko, Mariya Stępień-Damm, Julia Gladyshevskii, Roman |
| author_institution_txt_mv | [
{
"author": "Bohdana Belan",
"institution": "Department of Inorganic Chemistry, Ivan Franko National University of Lviv"
},
{
"author": "Mariya Dzevenko",
"institution": "Heroes of Kruty Lviv State Lyceum with enhanced military and physical training"
},
{
"author": "Julia Stępień-Damm",
"institution": "Institute of Low Temperature and Structure Research, Polish Academy of Sciences"
},
{
"author": "Roman Gladyshevskii",
"institution": "Department of Inorganic Chemistry, Ivan Franko National University of Lviv"
}
] |
| author_sort | Belan, Bohdana |
| baseUrl_str | https://ucj.org.ua/index.php/journal/oai |
| collection | OJS |
| datestamp_date | 2026-07-22T08:23:50Z |
| description | The structure of Pr3Co2Ge7.36 (Cmmm, a = 4.236 (1), b = 25.994(5), c = 4.272(1) Å, Z = 2) can be considered as a partly disordered derivative of the La3Co2Sn7 type. The Ge positions in the Pr4Ge8 cuboctahedra of the AuCu3-type slabs are conveniently described by two partly occupied sites, one of which is split. The Co and Ge atoms are characterized by square-antiprismatic, cubooctahedral, and trigonal-prismatic coordination. |
| doi_str_mv | 10.33609/2708-129X.88.11.2022.3-10 |
| first_indexed | 2025-09-24T17:43:47Z |
| format | Article |
| fulltext |
3
UDC 548.736.4+546.669:546.747:546.28 doi: 10.33609/2708-129X.88.11.2022.3-10
CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36
B. Belan1, M. Dzevenko2, J. Stępień-Damm3, R. Gladyshevskii1
Dedicated to the memory of Prof. Oksana Bodak
1Department of Inorganic Chemistry, Ivan Franko National University of Lviv,
6 Kyryla i Mefodia Str., 79005 L’viv, Ukraine
2Kruty Heroes Lviv Lyceum with intensive military and physical training,
68 Pasichna Str., 79038 L’viv, Ukraine
3Institute of Low Temperature and Structure Research, Polish Academy of Sciences,
P. O. Box 1410, 50–950 Wrocław 2, Poland
e-mail: bohdanabelan@gmail.com
The structure of Pr3Co2Ge7.36 (Cmmm, a = 4.236 (1), b = 25.994(5), c = 4.272(1) Å, Z = 2)
can be considered as a partly disordered derivative of the La3Co2Sn7 type. The Ge positions
in the Pr4Ge8 cuboctahedra of the AuCu3-type slabs are conveniently described by two partly
occupied sites, one of which is split. The Co and Ge atoms are characterized by square-anti-
prismatic, cubooctahedral, and trigonal-prismatic coordination.
Key words: praseodymium, cobalt, germanium, crystal structure, single crystal method.
INTRODUCTION. Intermetallic compo
unds formed in the ternary systems RE-Co-Ge
(RE = rare earth metals) have attracted consi
derable scientific interest due to various crystal
structures and interesting physical properties.
On the other hand, the most effective way to
find new compounds is to study in detail the iso-
thermal sections of the corresponding systems.
Therefore, our main scientific interest is focus-
es on the investigation of RE-Co-Ge ternary
systems. Some of the RE-Co-Ge systems have
been studied only for searching of new com-
pounds, for example the La-Co-Ge system [1].
The isothermal section have been constructed
for other systems. Particularly, the isothermal
sections of the ternary systems Ce-Co-Ge [2, 3],
Pr-Co-Ge [4], Nd-Co-Ge [5], Sm-Co-Ge [6],
and Eu-Co-Ge [7] have been constructed in
whole concentration range. The majority of
these systems are characterized by formation
of rather large number of compounds. Thus,
11 ternary compounds have been found in the
Ce-Co-Ge system, 13 ternary compounds – in
the Pr-Co-Ge system, 16 compounds – in the
Nd-Co-Ge system, 18 compounds – in the Sm-
Co-Ge system, and only three compounds – in
the Eu-Co-Ge system. However, crystal struc-
tures are determined only for a few of them.
During the study of the Pr-Co-Ge system, we
have found the new ternary compound. Here-
in we present the results of the crystal struc-
ture determination of Pr3Co2Ge7.36, which is
the new representative of La3Co2Sn7 structure
type.
4 ISSN 2708-129X. Укр. хім. журн., 2022
CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36INORGANIC CHEMISTRY
EXPERIMENT AND DISCUSSION OF
THE RESULTS. The sample with composition
Pr22.72Co18.18Ge59.1 was melted under an argon
atmosphere in an arc furnace, and annealed at
870 K under vacuum for 350 h. Single crystals
were selected from the sample by mechanical
fragmentation. They exhibit metallic lustre
whereas the ground powders are dark grey.
The crystal structures of the compound were
investigated by X-ray single-crystal diffraction.
The reflections intensities were measured with
graphite-monochromatized Мо Kα radiation
on an KM4CCD diffractometer at 293(2) K. The
structures were solved by direct methods and
refined by the SHELXL-97 program package [8]
with anisotropic atomic displacement parame
ters. The composition of the investigated sin-
gle crystal was analyzed in a scanning electron
microscope with an EDAX Genesis XM4 spec-
trometer. The experimentally determined com-
position of the grain of is close to the composi-
tion calculated from the structure refinements.
The crystallographic data and details on the
data collection for Pr3Co2Ge7.36 are listed in Ta-
ble 1. The structure was refined in space group
Cmmm with anisotropic atomic displacement
parameters. A final electron-density difference
map was flat and did not reveal any signifi-
cant residual peaks. The majority of the crys-
tallographic positions are fully occupied. The
exception is the positions Ge4, Ge5 and Ge6,
which are occupied only on 0.215, 0.287 and
0.361 accordingly. Due to such low occupation
if these positions the Uiso has been calculated
instead of anisotropic displacement parame-
ters. Final atomic positional and displacement
parameters of Pr3Co2Ge7.36 compound are pre-
sented in Table 2.
Table 1.
Crystal data and structure refinement details for Pr3Co2Ge7.36 .
Empirical formula Pr3Co2Ge7.36
Formula weight 524.36
T, K 293(2)
Space group Cmmm
Pearson code OC24,72
Unit cell dimensions, Å a = 4.236(1), b = 25.994(5), c = 4.272(1)
Volume, Å3 470.4(2)
No. formula units per unit cell 2
Calculated density, g∙cm–3 7.404
Absorption coefficient, mm-1 40.553
F(000), e 910
Crystal color metallic
θ range for data collection 10.60–30.50
Index ranges –3≤h≤6, –35≤k≤34, –5≤l≤6
5https://ucj.org.ua
B. Belan, M. Dzevenko, J. Stępień-Damm, R. Gladyshevskii UCJ № 11 / Vol. 88
Measured reflections 3325
Independent reflections / Rint 422 / 0.1888
Reflections with I > 2 σ(I) / Rσ 311 / 0.0892
Data / restraints / parameters 422 / 0 / 31
Goodness-of-fit on F2 1.170
Final R1 / wR2 [I > 2 σ(I)] 0.0760 / 0.1900
Final R1 / wR2 (all data) 0.0975 / 0.2044
Largest diff. peak / hole, e Å−3 3.391 / –4.018
Table 2.
Atomic coordinates and thermal displacement parameters for Pr3Co2Ge7.36 .
Atom Wyckoff Site G x y z Ueq, Å
2 Uiso, Å
2
Pr1 4j 1 0 0.31584(6) 0.5 0.0161(6)
Pr2 2a 1 0 0 0 0.0145(7)
Co 4i 1 0 0.13092(15) 0 0.0180(9)
Ge1 4j 1 0 0.09140(13) 0.5 0.0190(8)
Ge2 4i 1 0 0.22086(13) 0 0.0159(7)
Ge3 4i 1 0 0.40856(13) 0 0.0203(8)
Ge4 4j 0.215(1) 0 0.4480(6) 0.5 0.015(2)
Ge5 4j 0.287(1) 0 0.4734(4) 0.5 0.015(2)
Ge6 2c 0.361(2) 0.5 0 0.5 0.015(2)
Atom U11 U22 U33 U12 = U13 = U23
Pr1 0.0190(9) 0.0208(10) 0.0086(8) 0
Pr2 0.0178(10) 0.0168(11) 0.0088(9) 0
Co 0.0218(16) 0.0221(19) 0.0099(13) 0
Ge1 0.0267(15) 0.0220(16) 0.0082(11) 0
Ge2 0.0167(13) 0.0199(14) 0.0111(11) 0
Ge3 0.0201(14) 0.0260(18) 0.0149(12) 0
Table 1.
6 ISSN 2708-129X. Укр. хім. журн., 2022
CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36INORGANIC CHEMISTRY
The interatomic distances (δ), the values of
interatomic distances reductions from the sum
of atomic radii and coordination numbers of
atoms for Pr3Co2Ge7.36 listed in Table 3 (values
of the atomic radii are taken from [9]: r(Pr) =
1.828 Å, r(Co) = 1.253 Å, r(Ge) = 1.220 Å).
The majority of interatomic distances are in
good agreement with the sum of atomic sizes.
Some Ge-Ge interatomic distances are rather
short and another one are rather long in com-
parison with the sum of the respective atomic
radii.
Table 3.
Interatomic distances (δ), ∆ values (∆ = 100(∑r − δ)/ ∑r, where ∑r is the sum of the respec-
tive atomic radii) of Pr3Co2Ge7.36 compound (alternative positions are italicized).
Atoms δ, Å ∆, % Atoms δ, Å ∆, %
Pr1 4 Ge2 3.156(1) 3.4 Ge2 1 Co1 2.338(5) -5.8
2 Ge1 3.209(3) 5.0 2 Ge2 2.604(3) 6.3
2 Ge3 3.220(3) 5.3 4 Pr1 3.156(1) 3.4
2 Ge2 3.265(3) 6.6 2 Pr1 3.265(3) 6.6
4 Co1 3.311(2) 6.9 Ge3 2 Co1 2.354(2) -5.0
1 Ge4 3.435(16) 11.3 2 Ge4 2.369(7) -3.0
2 Pr1 4.025(2) 9.2 2 Ge5 2.721(7) 10.3
Pr2 4 Ge6 3.008(1) -1.3 4 Ge1 3.008(1) 18.9
8 Ge5 3.087(2) 1.3 2 Pr2 3.184(3) 4.3
4 Ge3 3.184(3) 4.3 2 Ge6 3.196(3) 23.7
4 Ge1 3.195(3) 4.6 2 Pr1 3.220(3) 5.3
8 Ge4 3.298(6) 7.6 Ge4 2 Ge1 2.353(7) -3.7
2 Co1 3.403(4) 9.5 2 Ge3 2.369(7) -3.0
Co 1 Ge2 2.338(5) -5.8 1 Ge4 2.703(22) 9.7
2 Ge3 2.354(2) -5.1 4 Pr2 3.298(6) 7.6
2 Ge1 2.370(2) -4.3 1 Pr1 3.435(16) 11.3
4 Pr1 3.311(2) 6.9 Ge5 2 Ge1 2.706(7) 9.8
1 Pr2 3.403(4) 9.5 2 Ge3 2.721(7) 10.3
Ge1 2 Ge4 2.353(7) -3.7 4 Pr2 3.087(2) 1.26
2 Co1 2.370(2) -4.3 Ge6 4 Pr2 3.008(1) -1.3
2 Ge5 2.706(7) 9.8 4 Ge1 3.183(3) 23.3
4 Ge3 3.008(1) 18.9 4 Ge3 3.196(3) 23.7
2 Ge6 3.183(3) 23.3
2 Pr2 3.195(3) 4.6
2 Pr1 3.209(3) 5.0
7https://ucj.org.ua
B. Belan, M. Dzevenko, J. Stępień-Damm, R. Gladyshevskii UCJ № 11 / Vol. 88
4
described as tetragonal prism with four additional atoms opposite sides. The Ge1 and Ge3 atoms are
surrounded by four praseodymium atoms, two cobalt and six germanium, two of which are two Ge
4 or two Ge5 or two Ge6. The CP of the Ge2 atoms is tricapped trigonal prism, which consist of all
three types of atoms. The CP of Ge 4 atoms are similar to the CP of the Co atoms. The tetragonal
antiprism is the CP of the Ge5 atoms. The Ge6 atoms are surrounded of by four Pr and eight Ge
atoms.
Fig. 1. A projection of the Pr3Co2Ge7.36 unit cell on ab plane and a view of the coordination polyhedra of the
atoms.
The structure of Pr3Co2Ge7.36 can be considered as a partly disordered derivative of the
La3Co2Sn7 type. The main difference between these structures is in the additional position of the Ge
atoms. The (2c) position of Ge6 atoms in the structure of our compound is partially occupied and
two additional split positions (4j) of Ge 4 and Ge5 atoms are partially occupied as well. All these
three postion can be considered as displacement of some Ge atoms from (2c) in (4j) with
simultaneous splitting.
The Pr3Co2Ge7.36 structures can be described as packing of two types polyhedra with the Pr in
the center (Fig.2). First polyhedral is cuboctahedra [Pr2(Ge12)] similar to the AuCu3-type slabs with
two partly occupied sites of Ge atoms, one of which is split. The second one is slightly distorted
hexagonal prism [Pr1(Co4Ge10)] with two additional germanium atoms opposite the side faces.
Fig. 2. Packing of [Pr2(Ge12)] (yellow) and [Pr1(Co4Ge10)] (blue) slabs in the Pr3Co2Ge7.36 structure.
The projection of the crystal structure of
Pr3Co2Ge7.36 on the ab plane and the coordina-
tion polyhedral (CP) of the atoms are shown
in Fig. 1. It must be noted that some coordi-
nation polyhedrons are rather unusual due
to partial occupation of crystallographic po-
sitions and some disordered of the structure
in comparison with the structure of prototype
La3Co2Sn7. Moreover, the Ge4, Ge5 and Ge6
atoms are too close and cannot be in one re-
gion simultaneously. Therefore, only one of
these atoms can be in one region, respective-
ly, or the Ge4, or the Ge5 or the Ge6 atom is
included to coordination polyhedra as well
(such positions are marked in Table 3 with
italics). Additionally, only the Ge6 atoms are
indicated in Fig. 1 and 2 for clarity. The coor-
dination polyhedra for the Pr atoms have from
17- and 20-vertices and consist of the atoms of
all sorts. The coordination sphere of the Pr1
atoms consist of 11 germanium atoms, four
cobalt and two praseodymium atoms, which
form of a very irregular polyhedron. The Pr2
atoms are surrounded by 12 Ge atoms and
two Co atoms. Eight germanium atoms form
distorted square prism (if the Ge6 atoms are
taken) with four additional germanium atoms
on the side faces. The one cobalt atom is lo-
cated above each of the square bases of this
prism. The Co atoms are surrounded by five
germanium atoms and five praseodymium
atoms. The CP can be described as pyramid
with quadrangular base with additional atoms.
The coordination number of the germanium
atoms are ranges from 8 to 12. The Ge1 and Ge3
have similar coordination polyhedral, which
can be described as tetragonal prism with four
additional atoms opposite sides. The Ge1 and
Ge3 atoms are surrounded by four praseo-
dymium atoms, two cobalt and six germani-
um, two of which are two Ge 4 or two Ge5 or
two Ge6. The CP of the Ge2 atoms is tricapped
trigonal prism, which consist of all three types
of atoms. The CP of Ge 4 atoms are similar to
the CP of the Co atoms. The tetragonal anti
prism is the CP of the Ge5 atoms. The Ge6
atoms are surrounded of by four Pr and eight
Ge atoms.
Fig. 1. A projection of the
Pr3Co2Ge7.36 unit cell on ab
plane and a view of the coordi-
nation polyhedra of the atoms.
8 ISSN 2708-129X. Укр. хім. журн., 2022
CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36INORGANIC CHEMISTRY
The structure of Pr3Co2Ge7.36 can be con-
sidered as a partly disordered derivative of the
La3Co2Sn7 type. The main difference between
these structures is in the additional position of
the Ge atoms. The (2c) position of Ge6 atoms
in the structure of our compound is partially
occupied and two additional split positions
(4j) of Ge 4 and Ge5 atoms are partially oc-
cupied as well. All these three postion can be
considered as displacement of some Ge atoms
from (2c) in (4j) with simultaneous splitting.
The Pr3Co2Ge7.36 structures can be de-
scribed as packing of two types polyhedra
with the Pr in the center (Fig.2). First polyhe-
dral is cuboctahedra [Pr2(Ge12)] similar to the
AuCu3-type slabs with two partly occupied
sites of Ge atoms, one of which is split. The se
cond one is slightly distorted hexagonal prism
[Pr1(Co4Ge10)] with two additional germani-
um atoms opposite the side faces.
4
described as tetragonal prism with four additional atoms opposite sides. The Ge1 and Ge3 atoms are
surrounded by four praseodymium atoms, two cobalt and six germanium, two of which are two Ge
4 or two Ge5 or two Ge6. The CP of the Ge2 atoms is tricapped trigonal prism, which consist of all
three types of atoms. The CP of Ge 4 atoms are similar to the CP of the Co atoms. The tetragonal
antiprism is the CP of the Ge5 atoms. The Ge6 atoms are surrounded of by four Pr and eight Ge
atoms.
Fig. 1. A projection of the Pr3Co2Ge7.36 unit cell on ab plane and a view of the coordination polyhedra of the
atoms.
The structure of Pr3Co2Ge7.36 can be considered as a partly disordered derivative of the
La3Co2Sn7 type. The main difference between these structures is in the additional position of the Ge
atoms. The (2c) position of Ge6 atoms in the structure of our compound is partially occupied and
two additional split positions (4j) of Ge 4 and Ge5 atoms are partially occupied as well. All these
three postion can be considered as displacement of some Ge atoms from (2c) in (4j) with
simultaneous splitting.
The Pr3Co2Ge7.36 structures can be described as packing of two types polyhedra with the Pr in
the center (Fig.2). First polyhedral is cuboctahedra [Pr2(Ge12)] similar to the AuCu3-type slabs with
two partly occupied sites of Ge atoms, one of which is split. The second one is slightly distorted
hexagonal prism [Pr1(Co4Ge10)] with two additional germanium atoms opposite the side faces.
Fig. 2. Packing of [Pr2(Ge12)] (yellow) and [Pr1(Co4Ge10)] (blue) slabs in the Pr3Co2Ge7.36 structure.
Fig. 2. Packing of [Pr2(Ge12)] (yellow) and [Pr1(Co4Ge10)] (blue) slabs
in the Pr3Co2Ge7.36 structure.
CONCLUSIONS. The crystal structure of
ternary compound Pr3Co2Ge7.36 have been in-
vestigated in detail using single crystal X-ray
data for the first time. This compound is disor-
dered derivative of the La3Co2Sn7-type struc-
ture.
ACKNOWLEDGMENTS. This study
was performed under the research pro-
ject of Ivan Franko National University
of Lviv “New substances, materials, types of
matter and approaches to energy saving and
environmental protection”, state registration
number: 0121U113567 (21-01-2022).
9https://ucj.org.ua
B. Belan, M. Dzevenko, J. Stępień-Damm, R. Gladyshevskii UCJ № 11 / Vol. 88
КРИСТАЛІЧНА СТРУКТУРА НОВОГО ГЕРМА-
НІДУ Pr3Co2Ge7.36
Б. Белан1*, М. Дзевенко2,
Ю. Степень-Дамм3, Р. Гладишевський1
1Львівський національний університет іме-
ні Івана Франка, вул. Кирила і Мефодія, 6,
Львів 79005, Україна
2Львівський ліцей з посиленою військово-фі-
зичною підготовкою імені Героїв Крут,
вул. Пасічна, 68, Львів 79000, Україна
3Інститут низькотемпературних і струк-
турних досліджень, Польська академія наук,
П. О. Бокс 1410, Вроцлав 2, 50–950, Польща
*е-mail: bohdanabelan@gmail.com
Потрійну систему Pr-Co-Ge досліджу-
вали і раніше. Так, було побудовано ізотер-
мічний переріз діаграми її стану в повному
концентраційному інтервалі та знайдено
існування 13 тернарних сполук. Однак,
кристалічну структуру досліджено лише для
кількох із них. Під час більш детального до-
слідження системи Pr-Co-Ge знайдено нову
потрійну сполуку Pr3Co2Ge7,36 та встановлено
її кристалічну структуру методом монокри-
сталу. Зразок синтезовано методом електро-
дугового плавлення. Монокристал відібрано
зі зразка, відпаленого за температури 870 K
впродовж 350 год. Масив експерименталь-
них інтенсивностей відбить отримано на
автоматичному монокристальному дифрак-
тометрі KM4CCD (MoKα-проміння). Струк-
туру визначено прямими методами за допо-
могою комплексу програм SHELX-2018/3.
Параметри теплового зміщення усіх ато-
мів уточнено в анізотропному наближенні.
Кристалічну структуру сполуки Pr3Co2Ge7.36
(Cmmm, a = 4,236 (1), b = 25,994(5), c =
4,272(1) Å, Z = 2) можна розглядати як ча-
стково невпорядкований варіант структури
типу La3Co2Sn7. Більшість кристалографіч-
них позицій в структурі дослідженої сполу-
ки є повністю зайнятими. Винятком є пози-
ції Ge4, Ge5 і Ge6, які зайняті лише на 0,215,
0,287 і 0,361 частки відповідно. Більшість
міжатомних відстаней добре узгоджують-
ся з сумою атомних розмірів, за винятком
деяких відстаней Ge-Ge, одні з яких є дещо
коротшими, а інші дещо довшими порівня-
но із сумою відповідних атомних радіусів.
Координаційні поліедри атомів є типовими
для подібних структур, проте вони є дещо
відмінні від відповідних поліедрів атомів
у структурі прототипу La3Co2Sn7. Це мож-
на пояснити деякою розупорядкованістю
структури сполуки Pr3Co2Ge7.36 та наявніс-
тю розщеплених позицій атомів германію.
Координаційні поліедри атомів празеодиму
мають 17 і 20 вершин і складаються з атомів
усіх сортів. Координаційний поліедр атомів
кобальту можна описати як піраміду з чоти-
рикутною основою, побудованою з атомів
празеодиму, з п'ятьма додатковими атомами
германію навпроти усіх граней. Координаці-
йне число атомів германію коливається від
8 до 12.
Структуру сполуки Pr3Co2Ge7.36 можна
представити як упаковку двох видів полі-
едрів, побудованих навколо атомів празе-
одиму. Перший поліедр – це кубоктаедри,
подібні до відповідних у структурі типу
AuCu3 з двома частково зайнятими поло-
женнями атомів Ge, одне з яких розщепле-
не. Інший поліедр – це злегка спотворена
гексагональна призма з двома додатковими
атомами германію навпроти бічних граней.
Ключові слова: празеодим, кобальт,
кристалічна структура, метод монокрис
талу.
10 ISSN 2708-129X. Укр. хім. журн., 2022
CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36INORGANIC CHEMISTRY
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Cтаття надійшла 05.12.2022.
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| id | oai:ojs2.1444248.nisspano.web.hosting-test.net:article-493 |
| institution | Ukrainian Chemistry Journal |
| keywords_txt_mv | keywords |
| language | English |
| last_indexed | 2026-07-23T01:09:02Z |
| publishDate | 2022 |
| publisher | V.I.Vernadsky Institute of General and Inorganic Chemistry |
| record_format | ojs |
| resource_txt_mv | ucjorgua/01/124ea22f40cffe54b859dc79e1503001.pdf |
| spelling | oai:ojs2.1444248.nisspano.web.hosting-test.net:article-4932026-07-22T08:23:50Z CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36 Belan, Bohdana Dzevenko, Mariya Stępień-Damm, Julia Gladyshevskii, Roman praseodymium, cobalt, germanium, crystal structure, single crystal method. The structure of Pr3Co2Ge7.36 (Cmmm, a = 4.236 (1), b = 25.994(5), c = 4.272(1) Å, Z = 2) can be considered as a partly disordered derivative of the La3Co2Sn7 type. The Ge positions in the Pr4Ge8 cuboctahedra of the AuCu3-type slabs are conveniently described by two partly occupied sites, one of which is split. The Co and Ge atoms are characterized by square-antiprismatic, cubooctahedral, and trigonal-prismatic coordination. V.I.Vernadsky Institute of General and Inorganic Chemistry 2022-12-23 Article Article Inorganic Chemistry Неорганическая химия Неорганічна хімія application/pdf https://ucj.org.ua/index.php/journal/article/view/493 10.33609/2708-129X.88.11.2022.3-10 Ukrainian Chemistry Journal; Vol. 88 No. 11 (2022): Ukrainian Chemistry Journal; 3-10 Украинский химический журнал; ##issue.vol## 88 ##issue.no## 11 (2022): Ukrainian Chemistry Journal; 3-10 Український хімічний журнал; Том 88 № 11 (2022): Український хімічний журнал; 3-10 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/493/253 Copyright (c) 2022 Bohdana Belan, Mariya Dzevenko, Julia Stępień-Damm, Roman Gladyshevskii https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Belan, Bohdana Dzevenko, Mariya Stępień-Damm, Julia Gladyshevskii, Roman CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36 |
| title | CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36 |
| title_full | CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36 |
| title_fullStr | CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36 |
| title_full_unstemmed | CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36 |
| title_short | CRYSTAL STRUCTURE OF THE NEW GERMANIDE Pr3Co2Ge7.36 |
| title_sort | crystal structure of the new germanide pr3co2ge7.36 |
| topic_facet | praseodymium cobalt germanium crystal structure single crystal method. |
| url | https://ucj.org.ua/index.php/journal/article/view/493 |
| work_keys_str_mv | AT belanbohdana crystalstructureofthenewgermanidepr3co2ge736 AT dzevenkomariya crystalstructureofthenewgermanidepr3co2ge736 AT stepiendammjulia crystalstructureofthenewgermanidepr3co2ge736 AT gladyshevskiiroman crystalstructureofthenewgermanidepr3co2ge736 |