Zwei monokline Kupfer-Oxovanadate des Magnesiums mit geordneter Metallverteilung: m-Mg2CuV2O8 und MgCu2V2O8. Ein Beitrag zur Dimorphie von Mg2CuV2O8 / Two Monoclinic Copper Oxovanadates of Magnesium Showing Ordered Metal Distribution: m-Mg2CuV2O8 and MgCu2V2O8. A Contribution on Dimorphism of Mg2CuV2O8
1996 ◽
Vol 51
(6)
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pp. 817-821
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Keyword(s):
Abstract Single crystals of ra-Mg2CuV2O8 (I) and MgCu2V2O8 (II) have been prepared by solid state reactions. The orange (I) and dark red (II) crystals show monoclinic symmetry, space group C52h -P21/c, (I): a = 6.167(3), b = 8.172(5), c = 6.400(8) Å, β = 116.22(3)°, Z = 2; (II): a = 6.453(1), b = 8.342(2), c = 11.517(2)Å,β 90.44(2), Z = 4. Both compounds show ordered metal distributions and vanadium in tetrahedral coordination by oxygen. (I) is characterized by elongated CuO6 octahedra and (II) by trigonal CuO5 bipyramids. m-Mg2CuV2O8 is the low temperature form of the formerly investigated orthorhombic o-Mg2CuV2O8. Calculations of the Coulomb parts of the lattice energy of the two crystal forms are discussed
1994 ◽
Vol 49
(11)
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pp. 1463-1466
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1996 ◽
Vol 51
(4)
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pp. 489-492
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1997 ◽
Vol 52
(8)
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pp. 989-993
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1996 ◽
Vol 51
(2)
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pp. 229-232
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Keyword(s):
1997 ◽
Vol 52
(4)
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pp. 457-461
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Keyword(s):
Über das erste Oxopalladat-Arsenat: KMg3Pd(AsO4)3 / On the First Oxopalladat-Arsenate: KMg3Pd(AsO4)3
1995 ◽
Vol 50
(6)
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pp. 867-870
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