Zur Kristallchemie eines neuen Oxomolybdats: Cu2YbMo3O12/On the Crystal Chemistry of a New Molybdenum Oxide: Cu2YbMo3O12

1995 ◽  
Vol 50 (2) ◽  
pp. 257-260 ◽  
Author(s):  
H. Szillat ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Crystal Chemistry ◽  
Molybdenum Oxide ◽  
Structure Type ◽  
Oxidation States ◽  
Monoclinic Symmetry ◽  
X Ray ◽  
Symmetry Space ◽  
Symmetry Space Group

Single crystals of Cu2YbMo3O12 have been prepared by crystallization from melts and investigated by X-ray diffractometer techniques. Cu2YbMo3O12 crystallizes with monoclinic symmetry (space group C2h2 - P121/m 1, a = 5.162(2), b = 10.885(4), c = 8.699(4) Å. β = 95.73(7)°, Z = 2), forming a new structure type. Typical features are layers of CuO6 octahedra, connected via corners and edges. These layers are linked by molybdenum and ytterbium ions along [001]. The crystal structure as well as the coordination of copper, ytterbium and molybdenum and the oxidation states of copper and molybdenum are discussed with respect to the related but not isotypic compound (Cu,Zn)3,75Mo3O12.

Zur Kristallchemie eines Natrium-Cadmium-Oxoiridats: Na3Cd2IrO6 / On the Crystal Chemistry of a Sodium Cadmium Oxoiridate: Na3Cd2IrO6

1996 ◽  
Vol 51 (6) ◽  
pp. 822-825 ◽  
Author(s):  
S. Frenzen ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Sodium Chloride ◽  
Single Crystals ◽  
Crystal Chemistry ◽  
Monoclinic Symmetry ◽  
Space Group ◽  
X Ray ◽  
Symmetry Space ◽  
Symmetry Space Group

Abstract Single crystals of Na3Cd2IrO6 have been prepared by crystallization from melts in closed silver tubes. The crystal structure was investigated by X-ray techniques. Na3Cd2IrO6, crystallizes with monoclinic symmetry, space group C32h-C2/m; a = 5.663(2), b = 9.783(3), c = 5.689(2) Å, β = 109.95(2)°, Z = 2. It is isotypic to M+5A7+O6 (M = Li, Na; A = Re, Os) and shows relations to the sodium chloride structure in spite of an ordered distribution of Na+, Cd2+ and Ir5+

Zur Darstellung und Kristallstruktur eines neuen Kupfer-Antimon-Oxomolybdats: CuSbMo2O8 / On the Synthesis and Crystal Structure of a New Copper Antimony Oxomolybdate: CuSbMo2O8

1995 ◽  
Vol 50 (5) ◽  
pp. 717-720 ◽  
Author(s):  
H. Szillat ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Structure Type ◽  
Monoclinic Symmetry ◽  
Unknown Compound ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
X Ray ◽  
Symmetry Space ◽  
Symmetry Space Group

Abstract Single crystals of the hitherto unknown compound CuSbMo2O8 were prepared by recrystallization from melts in closed copper tubes and investigated by X-ray diffractometer technique. CuSbMo2O8 crystallizes in a new structure type with monoclinic symmetry, space group C62h - I12/a1, a = 5.554(2), b = 4.916(1), c = 21.519(4) Å, β = 93.42(3)°, Z = 4. The crystal structure shows SbIII in a one-sided coordination by four oxygen. Molybdenum shows the rare octahedral coordination by oxygen. MoO6 and CuO6 octahedra form triple layers stacked and connected by Sb ions along [001].

Synthese und Kristallstruktur von KCuHo2Mo4O16 / Synthesis and Crystal Structure of KCuHo2Mo4O16

1994 ◽  
Vol 49 (3) ◽  
pp. 350-354 ◽  
Author(s):  
Holger Szillat ◽  
Hanskarl Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Structure Type ◽  
Monoclinic Symmetry ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
X Ray ◽  
Symmetry Space ◽  
Related Compounds ◽  
Symmetry Space Group

Abstract Single crystals of KCuHo2Mo4O16 have been prepared by recrystallisation from melts and investigated by X-ray diffractometer techniques. The compound crystallizes with monoclinic symmetry, space group C 2/c, a = 521.6(1), b = 1251.3(2), c = 1953.1(2) pm, β = 92.903(18)°, Z = 4. KCuHo2Mo4O16 represents a new structure type characterized by HoO8 and alternate CuO6/KO10 polyhedra chains. The connection of these polyhedra chains to each other and by MoO4 tetrahedra is described and the crystal structure discussed with respect to related compounds of the CuLnMo2O8 and KLnMo2O8 types.

Über das Oxomolybdat AgKCu3Mo4O16 mit Silber in siebenfacher Koordination / About the Oxomolybdate AgKCu3Mo4O16 with Silver in Seven-Fold Coordination

1995 ◽  
Vol 50 (2) ◽  
pp. 252-256 ◽  
Author(s):  
H. Szillat ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Monoclinic Symmetry ◽  
Space Group ◽  
X Ray ◽  
Silver Copper ◽  
Symmetry Space ◽  
Symmetry Space Group

Single crystals of AgKCu3Mo4O16 have been prepared by crystallization from melts and investigated by X-ray diffractometer techniques. This compound crystallizes with monoclinic symmetry, space group C2h5 - P21/c, a = 5.056(1), b = 14.546(4), c = 19.858(9) Å, β = 86.64(5)°, Z = 4. The crystal structure of AgKCu3Mo4O16 is closely related to K2Cu3Mo4O16 showing ribbons of edge-sharing CuO6 and AgO7 polyhedra. The ribbons are linked by tetrahedrally coordinated molybdenum and K2O10 groups. Another kind of MoO4 tetrahedra occupies the cavities inside the ribbons. The crystal structure and the coordination of silver, copper, potassium and molybdenum by oxygen are discussed with respect to K2Cu3Mo4O16.

Ein Beitrag zur Kristallchemie von Verbindungen mit Johillerit-Struktur: KCo3Cu(As2,58V0,42)O12 / On the Crystal Chemistry of Compounds with Johillerite Structure: KCo3Cu(As2,58V0,42)O12

1994 ◽  
Vol 49 (11) ◽  
pp. 1463-1466 ◽  
Author(s):  
D. Frerichs ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Solid State ◽  
Melting Point ◽  
Single Crystals ◽  
Crystal Chemistry ◽  
Structure Type ◽  
Solid State Reactions ◽  
Tetrahedral Coordination ◽  
Monoclinic Symmetry ◽  
Symmetry Space ◽  
Symmetry Space Group

Single crystals of KCo3Cu(As2.58V0.42)O12 were prepared by solid state reactions below the melting point of the reaction mixture (K2CO3, CuO, COC2O4, V2O5 and 3 As2O5 · 5H2O). It crystallizes with monoclinic symmetry, space group C62h-C2/c, a = 12.207, b = 12.730, c = 6.811 Å, β = 113.69°, Z = 4. The structure type is characterized by isolated twisted-square CuO4-polygons, CoO6-octahedra and a special 4+4-coordination of the potassium ion. As5+ and V5+ are in tetrahedral coordination with a partly statistical distribution of these ions.

Kristallstrukturuntersuchung am Barium-Yanadyl-Vanadat: Ba2(VO)V2O8 / Crystal Structure Investigation of the Barium Vanadyl-Vanadate: Ba2(VO)V2O8

1996 ◽  
Vol 51 (4) ◽  
pp. 489-492 ◽  
Author(s):  
J. Feldmann ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Single Crystals ◽  
Structure Type ◽  
Solid State Reactions ◽  
Tetrahedral Coordination ◽  
Structure Investigation ◽  
Monoclinic Symmetry ◽  
Symmetry Space ◽  
Symmetry Space Group

Abstract Single crystals of Ba2(VO)V2O8 have been prepared by solid state reactions of Ba2V2O7, V2O3 and V2O5 in sealed silica tubes. This compound crystallizes with monoclinic symmetry, space group C22 -P21, a = 8.1174(9), b = 5.9699(9), c = 9.2903(9) Å , β = 113.94(1)°, Z = 2. V 5+ shows tetrahedral coordination. V 4+ inside 1∞ [V (3)O4] chains is characterized by a square pyramidal coordination with a short apical V-O distance of 1.6 Å typically for vanadyl groups. Ba2(VO)V2O8 represents a new structure type and is not isotypic to Sr2(VO)V2O8.

Isolierte 1∞[TeO5]-Oktaederketten im Bleitellurat Pb2TeO5 / Isolated 1∞[TeO5] Chains of Octahedra in the Lead Tellurate Pb2TeO5

1998 ◽  
Vol 53 (3) ◽  
pp. 287-290 ◽  
Author(s):  
B. Wedel ◽  
L. Wulff ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Lone Pair ◽  
Lattice Energy ◽  
Monoclinic Symmetry ◽  
Space Group ◽  
X Ray ◽  
Symmetry Space ◽  
Symmetry Space Group

Abstract Single crystals of Pb2TeO5 have been prepared by flux techniques. X-ray investigations showed a new crystal structure with monoclinic symmetry, space group C4S -Cc, a = 13.099(3), b = 5.714(1), c = 7.520(2) Å, β = 123,80(3)°, Z = 4. Pb2TeO5 is characterized by 1∞[TeO5] chains of octahedra isolated from each other and incorporated into an edge, corner and face connected frame of PbO7 polyhedra. Possible positions of the lone pair of electrons of Pb2+ are estimated by calculations of Coulomb terms of lattice energy.

Zur Kristallstruktur von ( Cu , Mn ) UMo3O12/On the Crystal Structure of (Cu, Mn )UMo3O12

1996 ◽  
Vol 51 (3) ◽  
pp. 450-452 ◽  
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Lattice Energy ◽  
Oxidation States ◽  
Hexagonal Symmetry ◽  
Space Group ◽  
X Ray ◽  
Symmetry Space ◽  
Symmetry Space Group

Abstract Single crystals of (Cu,Mn)UMo3O12 have been prepared in sealed copper tubes. X-ray investigations lead to hexagonal symmetry, space group C6h2-P63/m a = 9.7895 (13), c = 6.202(1) Å , z = 2. (Cu,Mn)UMo3O12 is isotypic to CdThMo3O12. Calculations of the Coulomb terms of lattice energy with respect to different oxidation states of copper, molybdenum and uranium and the previously described pair of isotypic compounds of CdThMo3O12 to Na2ThRe6O24 are discussed.

Zwei Beispiele fiir partielle und totale Defekte im Ba▪Ln2Mo4O16-Typ: BaCu0,41▪0,59Pr2Mo4O16 und Ba▪Yb2Mo4O16 / Two Examples of Partial and Total Defects in the Ba▪Ln2Mo4O16-Typ: BaCu0,41▪0,59Pr2Mo4O16 and Ba▪Yb2Mo4O16

1996 ◽  
Vol 51 (1) ◽  
pp. 85-89 ◽  
Author(s):  
St. Gallinat ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Crystal Chemistry ◽  
Reference Compound ◽  
Monoclinic Symmetry ◽  
Space Group ◽  
First Case ◽  
Symmetry Space ◽  
Symmetry Space Group

Abstract Single crystals of (I) BaCu0,41Pr2Mo4O16 and (II) BaYb2Mo4O16 have been prepared by flux technique. Both compounds crystallize with monoclinic symmetry, space group C62h-C2/c with (I): a = 5.352(11), b = 12.888(2), c = 19.399(4) Å; β = 90.89(3)°; (II): a = 5.181(7), b = 12.467(3), c -19.350(3) Å , β -91.93(2)°, Z = 4. The crystal structure is characterized by 1∞[BaMO12]-chains along [010]. In the first case the M positions are occupied by copper by about 41%, in the second case these positions remain completely unoccupied. With respect to the crystal chemistry of the reference compound Ba(Cu0.22Mg0,78)Nd2Mo4O16 all substances of the composition BaLn2Mo4O16 should be written as Ba▪Ln2Mo4O16 indicating the holes in the 1∞[BaMO12]-chains by ▪.

Ein Beitrag zur Synthese und Kristallchemie des Alkalimetall-Kupfer -Oxomolybdats Rb0,6K0,4CuMo3O10 / A Contribution on the Synthesis and Crystal Chemistry of the Alkaline Copper Oxomolybdate Rb0.6K0.4CuMo3O10

1995 ◽  
Vol 50 (6) ◽  
pp. 875-878 ◽  
Author(s):  
H. Szillat ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Crystal Chemistry ◽  
Orthorhombic Symmetry ◽  
One Dimensional ◽  
X Ray ◽  
The One ◽  
Group D ◽  
Symmetry Space ◽  
Symmetry Space Group

Single crystals of Rb0.6K0.4CuMo3O10 have been prepared by crystallization from melts and investigated by X-ray diffractometer technique. They crystallize with orthorhombic symmetry, space group D2h16 -Pnma , a = 8.606(2), b = 7.595(3), c - 13.660(7) Å, Z = 4. The crystal structure of Rb0.6K0.4CuMo3O10 is characterized by the rare octahedral coordination of molybdenum and is related to (NH4)2Mo3O10 with respect to the one-dimensional 1∞[Mo3O10]- chains.

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