Zur Kristallstruktur von Ho2Se3/ On the Crystal Structure of Ho2Se3

1998 ◽  
Vol 53 (8) ◽  
pp. 900-902 ◽  
Author(s):  
Werner Urland ◽  
Helmut Person
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Chemical Transport ◽  
Type Structure ◽  
Space Group ◽  
Lattice Constants ◽  
Brownish Yellow ◽  
Structure Space

Abstract Starting from HoSe2-x powder and holmium metal bright brownish-yellow, plate-like single crystals of Ho2Se3 could be prepared by chemical transport with AlCl3. Holmium sesquiselenide crystallizes in the Sc2S3-type structure, space group Fddd, with lattice constants a = 1140,7(2), b -812,6(1) and c = 2423,9(3) pm.

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

scholarly journals AB2X2 - Verbindungen im CaAl2Si2-Typ, VII [1] Zur Struktur der Verbindungen SrZn2As2, SrCd2As2 und YbMnCuP2 / AB2X2 Compounds with the CaAl2Si2 Structure, VII [1] The Crystal Structure of SrZn2As2, SrCd2As2, and YbMnCuP2

1980 ◽  
Vol 35 (8) ◽  
pp. 939-941 ◽  
Author(s):  
Albrecht Mewis
Keyword(s):  
Crystal Structure ◽  
Type Structure ◽  
Space Group ◽  
Lattice Constants ◽  
Structure Space

Abstract The compounds SrZn2As2, SrCd2As2, and YbMnCuP2 have been prepared and their structures determined. They are isotypic and crystallize trigonally in a CaAl2Si2-type structure (space group P3̄m 1) with the lattice constants:SrZn2As2 a = 422,3(1) pm, c = 726,8(1) pm,SrCd2As2a = 445,2(1) pm, c = 741,6(1) pm,YbMnCuP2 a = 394,9(1) pm, c = 648,4(1) pm.

Darstellung und Struktur der Verbindungen MgCuP, BaCuP(As) und BaAgP(As) / Preparation and Crystal Structure of MgCuP, BaCuP(As), and BaAgP(As)

1979 ◽  
Vol 34 (10) ◽  
pp. 1373-1376 ◽  
Author(s):  
Albrecht Mewis
Keyword(s):  
Crystal Structure ◽  
Space Group ◽  
Lattice Constants ◽  
Structure Space

Abstract The ABX-compounds MgCuP, BaCuP(As) and BaAgP(As) have been prepared and their structures determined. MgCuP crystallizes orthorhombically in an anti-PbCl2-structure (space group Pnma-D162h, a = 653.2(1) pm, b - 383.5(1) pm, c = 717.0(1) pm). The compounds BaCuP(As) and BaAgP(As) are isotypic and crystallize in a modified Ni2ln-structure (space group P63/mmc-D46h) with the lattice constants:BaCuP a = 423.9(1) pm, c = 900.6(2) pm,BaCuAs a = 437.2(1) pm, c = 907.3(2) pm,BaAgP a = 449.6(1) pm, c = 882.8(2) pm,BaAgAs a = 461.3(1 )pm, c = 889.6(1) pm.

scholarly journals Zur Darstellung und Kristallstruktur von β-NbO2 / Synthesis and Crystal Structure of β-NbO2

1982 ◽  
Vol 37 (11) ◽  
pp. 1361-1368 ◽  
Author(s):  
H.-J. Schweizer ◽  
Reginald Gruehn
Keyword(s):  
Crystal Structure ◽  
Long Range ◽  
Chemical Transport ◽  
Range Order ◽  
Long Range Order ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants

By using chemical transport reactions with various transporting agents (HgCl2, NbCl5, Nb3O7Cl) a slightly substoiehiometric NbO2-phase, β-NbO2, was obtained from samples with O/Nb ∼ 1.5 (source; T > 1373 K) and with deposition temperatures > 1273 K (sink). The rango of composition of β-NbO2 was found to exist from NbO1.990 to NbO1.998.The structure of the tetragonal, column-shaped black crystals was determined by X-ray diffraction. It crystallizes tetragonally in the space group I41 with lattice constants a = 9.693(3) Å, c = 5.985(1) Å and Z = 10 formula units.The crystal structure of β-NbO2 is shown to be a deformed rutile type. As in α-NbO2 the Nb-atoms are grouped in pairs. However, both oxides are different with respect to their long-range order.

Zur Kenntnis von Ba2Fe22+ Fe93+Al11O34 / About Ba2Fe22+ Fe93+Al11O34

1978 ◽  
Vol 33 (2) ◽  
pp. 146-148 ◽  
Author(s):  
Hk. Müller-Buschbaum ◽  
M. Harder
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Single Crystals ◽  
Solid State Reaction ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Data Space ◽  
Group D ◽  
O 11

Single crystals of the compound Ba2Fe11Al11O34 were prepared by solid state reaction (1700 °C) of BaO-Fe2O3-Al2O3 mixtures. The crystal structure was investigated by X-ray data (space group D46h-P63/mmc, lattice constants: a = 565.3, c = 2281.0 pm). Ba2Fe11Al11O34 is isotypic with Na2O · 11 Al2O3, the structure of β-alumina

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.

Über Oxocuprate, ΧΧΙII Zur Kenntnis von Ho2Cu2O5 / On Oxocuprates, XXIII About Ho2Cu2O5

1977 ◽  
Vol 32 (6) ◽  
pp. 609-611 ◽  
Author(s):  
H.-R. Freund ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Oxide Mixture ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Data Space

Single crystals of the compound Ho2Cu2O5 were obtained by melting the oxide mixture (2 CuO : 1 Ho2O3), using KF as a flux. The crystal structure was investigated by single crystal X-ray data (Space group C2v9-P 21 nb, lattice constants: a = 1247.8, b = 1081.3, c = 349.5 pm).

scholarly journals NaBeAs(Sb) – Ternäre Phasen im „aufgefüllten“ NiAs(Ni2In)-Typ / NaBeAs(Sb) – Ternary Phases in a „Filled“ NiAs(Ni2In)-Structure

1977 ◽  
Vol 32 (10) ◽  
pp. 1133-1138 ◽  
Author(s):  
Christoph Tiburtius ◽  
Hans-Uwe Schuster
Keyword(s):  
Single Crystal ◽  
Structure Determination ◽  
Type Structure ◽  
Crystal Data ◽  
Space Group ◽  
Lattice Constants ◽  
Structure Space

NaBeAs and NaBeSb crystallize in a modified Ni2In-type-structure, space group P 63/mmc–D6h4. Preparation and structure determination with powder and single crystal data are described. The bonds and the structure are discussed in comparison with corresponding compounds of the formula AMeIIX. The lattice constants are:NaBeAs: α = 3,820(5), c = 8,948(9), c/α = 2,34;NaBeSb: α = 4,144(5), c = 9,320(9), c/α = 2,25.

Über Oxoplumbate(IV) Die Kristallstruktur von HT-Li2PbO3 [1] The Crystal Structure of HT-Li2PbO3 [1] / On Oxoplumbates(IV) The Crystal Structure of HT-Li2PbO3 [1]

1983 ◽  
Vol 38 (6) ◽  
pp. 661-664 ◽  
Author(s):  
Berthold Brazel ◽  
Rudolf Hoppe
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Structure Determination ◽  
Type Structure ◽  
Ionic Radii ◽  
Space Group ◽  
Coordination Numbers

Abstract Single crystals of HT-Li2PbO3 have been prepared by heating of mixtures of Rb2PbO3 and Li2O [Ag-cylinders, 600 °C, 100 d]. The structure determination [1005 symmetry independent l0(hkl), R = 5.85%, Rw = 5.35%, confirms space group C2/c with a = 548.60(16), b = 949.51(22), c = 1027.35(27) pm, β = 100.11(3)°, drö = 6.78 g · cm-3 , dpyk = 6.80 g · cm-3 , Z - 8. The NaCl-type structure variant is characterized by alter-nating layers of Li+ and Pb4+ /Li+ cations, which are all octahedrally coordinated. Effective Coordination Numbers, ECoN are calculated via Mean Fictive Ionic Radii, MEFIR.

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.

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