AB2X2-Verbindungen im CaAl2Si2-Typ, IV [1] Zur Struktur der Verbindungen CaZn2Sb2, CaCd2Sb2, SrZn2Sb2 und SrCd2Sb2 / AB2X2 Compounds with the CaAl2Si2 Structure, IV [1J The Crystal Structure of CaZn2Sb2, CaCd2Sb2, SrZn2Sb2, and SrCd2Sb2

1978 ◽  
Vol 33 (4) ◽  
pp. 382-384 ◽  
Author(s):  
Albrecht Mewis
Keyword(s):  
Crystal Structure ◽  
Type Structure ◽  
Space Group ◽  
X Ray ◽  
Ternary Compounds ◽  
Structure Space ◽  
Ray Methods

Abstract The four ternary compounds CaZn2Sb2, CaCd2Sb2, SrZn2Sb2, and SrCd2Sb2 have been prepared and investigated by X-ray methods. They are isotypic and crystallize trigonally in a CaAl2Si2-type structure (space group P3̅m 1-D33d) with the following constants:CaZn2Sb2 a = 4.441 ± 0.001 Å, c = 7.464 ± 0.002 Å;CaCd2Sb2 a = 4.649 ± 0.001 Å, c = 7.597 ± 0.002 Å;SrZn2Sb2 a = 4.500 ± 0.001 Å, c = 7,716 ± 0.002 Å; SrCd2Sb2 a = 4.709 ± 0.001 Å, c = 7.822 ± 0.003 Å.

AB2X2-Verbindungen im CaAl2Si2-Typ, V[1] Zur Struktur der Verbindungen CaMn2P2, CaMn2As2, SrMn2P2 und SrMn2As2 / AB2X2-Compounds with the CaAl2Si2 Structure, V [1] The Crystal Structure of CaMn2P2, CaMn2As2, SrMn2P2, and SrMn2As2

1978 ◽  
Vol 33 (6) ◽  
pp. 606-609 ◽  
Author(s):  
Albrecht Mewis
Keyword(s):  
Crystal Structure ◽  
Type Structure ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Ternary Compounds ◽  
Structure Space ◽  
Ray Methods

Abstract Four ternary compounds with the formulas CaMn2P2, CaMn2As2, SrMn2P2, and SrMn2As2 have been prepared and investigated by X-ray methods. They are isotypic and crystallize trigonally in a CaAl2Si2-type structure (space group P3̅m 1-D33d) with the lattice constants: CaMn2P2 a = 4,096 ± 0,001 Å, c = 6,848 ± 0,002 Å, CaMn2As2 a = 4,239 ± 0,001 Å, c = 7,027 ± 0,003 Å, SrMn2P2 a = 4,168 ± 0,001 Å, c = 7,132 ± 0,001 Å, SrMn2As2 a = 4,306 ± 0,001 Å, c = 7,315 ± 0,001 Å. The lattice constants of BaMn2P2 and BaMn2As2 are given

Darstellung und Struktur der Verbindungen PrLi2P2, PrLi2As2 und NdLi2As2 / Preparation and Crystal Structure of PrLi2P2, PrLi2As2 and NdLi2As2

1980 ◽  
Vol 35 (10) ◽  
pp. 1322-1323 ◽  
Author(s):  
Herrad-Odilia Fischer ◽  
Hans-Uwe Schuster
Keyword(s):  
Crystal Structure ◽  
Space Group ◽  
X Ray ◽  
Cell Parameters ◽  
Ternary Compounds ◽  
Structure Space ◽  
Ray Methods

Abstract Three ternary compounds PrLi2P2, PrLi2As2 and NdLi2As2 have been prepared and investigated by X-ray methods. They are isotypic and crystallize trigonally in the CaAl2Si2-structure (Space group P3̅m1-D3d3) with the follow-ing cell parameters:PrLi2P2: a = 419.6 pm, c = 682.1 pm;PrLi2As2: a = 429.9 pm, c = 696.0 pm;NdLi2As2: a = 428.7 pm, c = 692.2 pm.

Ein Beitrag zur Chemie von Verbindungen des Bautyps MxPd3O4 / A Contribution to the Chemistry of the Compounds MxPd3O4

1979 ◽  
Vol 34 (12) ◽  
pp. 1661-1662 ◽  
Author(s):  
H.-J. Meyer ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Single Crystals ◽  
Type Structure ◽  
Space Group ◽  
X Ray ◽  
Structure Space ◽  
Ray Methods

Single crystals of a new compound Pd0.5Pd3O4 were prepared and investigated by X-ray methods. It crystallizes with NaxPt3O4-type structure (space group Oh3-Pm3n, a = 575.6 pm). The distribution of the oxydation states of Pd with respect to the lattice positions is discussed.

scholarly journals ABX-Verbindungen mit Ni2In-Struktur Darstellung und Struktur der Verbindungen CaCuP(As), SrCuP(As), SrAgP(As) und EuCuAs / ABX Compounds with the Structure Ni2In Preparation and Crystal Structure of CaCuP(As), SrCuP(As), SrAgP(As), and EuCuAs

1978 ◽  
Vol 33 (9) ◽  
pp. 983-986 ◽  
Author(s):  
Albrecht Mewis
Keyword(s):  
Crystal Structure ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Structure Space ◽  
Ray Methods

The compounds CaCuP(As), SrCuP(As), SrAgP(As) and EuCuAs were prepared and investigated by X-ray methods. They are isotypic and crystallize in a modified Ni2In structure (space group P 63/mmc-D6h1) with the lattice constants:CaCuP a = 405.5(1) pm, c = 780.3(3) pm,CaCuAs a = 418.4(1) pm, c = 786.8(2) pm,SrCuP a = 414.6(1) pm, c = 837.6(3) pm,SrCuAs a = 427.3(2) pm, c = 845.2(3) pm,EuCuAs a = 425.4(2) pm, c = 827.4(3) pm,SrAgP a = 440.9(1) pm, c = 823.0(3) pm,SrAgAs a = 452.9(1) pm, c = 829.1(2) pm.

scholarly journals Crystal structure of mechanochemically synthesized Ag2CdSnS4

2020 ◽  
Vol 75 (4) ◽  
pp. 393-402 ◽  
Author(s):  
Eva M. Heppke ◽  
Stefan Berendts ◽  
Martin Lerch
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Powder Diffraction ◽  
Mechanochemical Synthesis ◽  
Type Structure ◽  
Structural Investigations ◽  
Space Group ◽  
X Ray ◽  
Structure Space ◽  
Acta Crystallogr

AbstractAg2CdSnS4 was synthesized by a two step mechanochemical synthesis route. From a detailed analysis of the observed reflections in the X-ray powder diffraction pattern, the crystal structure proposed in the literature (space group Cmc21 [E. Parthé, K. Yvon, R. H. Deitch, Acta Crystallogr.1969, B25, 1164–1174; O. V. Parasyuk, I. D. Olekseyuk, L. V. Piskach, S. V. Volkov, V. I. Pekhnyo, J. Alloys Compd.2005, 399, 173–177]) is questionable. Our structural investigations presented in this contribution point to the fact that Ag2CdSnS4 crystallizes in the monoclinic wurtzkesterite-type structure (space group Pn). At around T = 200°C, a phase transition to the orthorhombic wurtzstannite-type structure (space group Pmn21) is observed.

Kristallstrukturen von Li6MgBr8 und Li2MgBr4/Crystal Structure of Li6MgBr8 and Li2MgBr4

1993 ◽  
Vol 48 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Michael Schneider ◽  
Peter Kuske ◽  
Heinz Dieter Lutz
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Type Structure ◽  
Ionic Conductors ◽  
X Ray Diffraction ◽  
Lithium Ions ◽  
Space Group ◽  
X Ray ◽  
Structure Space ◽  
High Temperature Polymorph

The crystal structures of the fast ionic conductors Li6MgBr8 and Li2MgBr4 oC 14 and cF 56 were determined by single crystal X -ray diffraction and neutron powder studies, respectively. At ambient temperature, Li6MBr8 (M = Mg, Mn) crystallize in a Suzuki-type structure (space group Fm3̄̄̄ m , Z = 4, Li6MgBr8: a = 1098.0(1) pm, 114 unique reflections, R = 0.037). Li2MgBr4 oC 14 crystallizes in a SnMn2S4-type structure (space group Cmmm , Z = 2, a = 777.94(2), b = 1104.25(4), and c = 386.55(1) pm , RI, = 0.073, 318 K), the high-temperature polymorph (HTM I) in the Li2MnBr4 cF 56 type (space group Fd 3 m , Z = 8, a = 1124.55(4) pm , RI , = 0.052, 673 K). These structure types are more or less ordered NaCl superstructures. The thermal ellipsoids of the lithium ions are discussed in terms of the conduction pathways and the order-disorder phase transitions observed.

Crystal structure of LnCuSn (Ln = Nd, Sm, Gd)

1998 ◽  
Vol 213 (10) ◽  
Author(s):  
J. V. Pacheco ◽  
K. Yvon ◽  
E. Gratz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Structure Space

AbstractThe title compounds were reinvestigated by single crystal X-ray diffraction. They crystallize with the ordered NdPtSb type structure (space group

scholarly journals CRYSTAL STRUCTURE OF THE NEW SILICIDE Lu3Ni11.74(2)Si4

2020 ◽  
Vol 86 (5) ◽  
pp. 3-12
Author(s):  
Bohdana Belan ◽  
Mykola Manyako ◽  
Mariya Dzevenko ◽  
Dorota Kowalska ◽  
Roman Gladyshevskii
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Arc Melting ◽  
Pearson Symbol ◽  
Ternary Silicide

The new ternary silicide Lu3Ni11.74(2)Si4 was synthesized from the elements by arc-melting and its crystal structure was determined by the single-crystal X-ray diffraction. The compound crystallizes in the Sc3Ni11Ge4-type: Pearson symbol hP37.2, space group P63/mmc (No. 194), a = 8.0985(16), c = 8.550(2) Å, Z = 2; R = 0.0244, wR = 0.0430 for 244 reflections. The silicide Lu3Ni11.74(2)Si4 is new member of the EuMg5.2-type structure family.

Über die Kristallstruktur von KSc2 F7 / The Crystal Structure of KSc2 F7

1985 ◽  
Vol 40 (6) ◽  
pp. 726-729 ◽  
Author(s):  
Klaus Güde ◽  
Christoph Hebecker
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Unit Cell ◽  
Space Group ◽  
X Ray ◽  
Monoclinic Unit Cell ◽  
R Value ◽  
Ray Methods

Abstract Single crystals of KSc2F7 have been prepared from a mixture of KF and ScF3 . The samples were investigated by X-ray methods. KSc2F7 crystallizes orthorhombically with a = 10.643(2), b = 6.540(1), c = 4.030(1) Å. These data indicate a close crystallographic connection to the monoclinic unit cell of KIn2F7 [1], But in contrast to KIn2F7 , KSc2 F7 crystallizes in space group No. 65. Cmmm - D192h. The R-value for 341 observed independent reflections is 0.060.

The solid solution TbNiIn1−x Ga x

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Myroslava Horiacha ◽  
Galyna Nychyporuk ◽  
Rainer Pöttgen ◽  
Vasyl Zaremba
Keyword(s):  
Solid Solution ◽  
Unit Cell ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
Space Group ◽  
X Ray ◽  
Cell Parameters ◽  
Structure Space ◽  
Arc Melting

Abstract Phase formation in the solid solution TbNiIn1−x Ga x at 873 K was investigated in the full concentration range by means of powder X-ray diffraction and EDX analysis. The samples were synthesized by arc-melting of the pure metals with subsequent annealing at 873 K for one month. The influence of the substitution of indium by gallium on the type of structure and solubility was studied. The solubility ranges have been determined and changes of the unit cell parameters were calculated on the basis of powder X-ray diffraction data: TbNiIn1–0.4Ga0–0.6 (ZrNiAl-type structure, space group P 6 ‾ 2 m $P‾{6}2m$ , a = 0.74461(8)–0.72711(17) and c = 0.37976(5)–0.37469(8) nm); TbNiIn0.2–0Ga0.8–1.0 (TiNiSi-type structure, space group Pnma, а = 0.68950(11)–0.68830(12), b = 0.43053(9)–0.42974(6), с = 0.74186(10)–0.73486(13) nm). The crystal structures of TbNiGa (TiNiSi type, Pnma, a = 0.69140(5), b = 0.43047(7), c = 0.73553(8) nm, wR2=0.0414, 525 F 2 values, 21 variables), TbNiIn0.83(1)Ga0.17(1) (ZrNiAl type, P 6 ‾ 2 m $P‾{6}2m$ , a = 0.74043(6), c = 0.37789(3) nm, wR2 = 0.0293, 322 F 2 values, 16 variables) and TbNiIn0.12(2)Ga0.88(2) (TiNiSi type, Pnma, a = 0.69124(6), b = 0.43134(9), c = 0.74232(11) nm, wR2 = 0.0495, 516 F 2 values, 21 variables) have been determined. The characteristics of the solid solutions and the variations of the unit cell parameters are briefly discussed.

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