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'magnesium' in keywords Facet   Publication Year 1996  [X]
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1996[X]
1Author    D. Frerichs, Hk Müller-BuschbaumRequires cookie*
 Title    Vier verschiedene Koordinationspolyeder um Cu2+ im Oxid-Arsenat-Phosphat Cu0  
 Abstract    (Cu,M g)3(As1_xPJt:0 4)2 (x = 0,3) Four Different Coordination Polyhedra Around Copper in the Oxide-Arsenate-Phosphate C u0(C u,M g)3(A s,_xP,.04)2 (x = 0.3) Single crystals of CuO(Cu,Mg)3[(As0.7P0.3)O4]2 have been prepared by crystallization from melts. The compound crystallizes with triclinic symmetry, space group C '-P l, a = 6.372(4), b = 7.643(7), c = 8.175(5) A, a = 98.59(6), ß = 112.26(3), 7 = 99.03(3)°, Z = 2. CuO(Cu,Mg)3[(Aso)7Po 3)0 4]2 is isotypic to Cu4(P 0 4)20 . X-ray investigations show square planar C u 04 polygons, twisted tetragonal C u 0 5 pyramids, C u 05 bipyramids and elongated (Cu,M g)06 octahedra. 
  Reference    (Z. Naturforsch. 51b, 25—28 [1996]; eingegangen am 27. Juli 1995) 
  Published    1996 
  Keywords    Copper, Magnesium, Arsenate, Phosphate, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0025.pdf 
 Identifier    ZNB-1996-51b-0025 
 Volume    51 
2Author    Z., D. Frerichs, Hk Müller-BuschbaumRequires cookie*
 Title    Synthesis and Crystal Chemistry o f the /3-Form o f a M ixed Zinc Orthoarsenate  
 Abstract    Single crystals o f Zn228M g0 72(A s 0 4) 2 have been prepared by C 0 2 L A S E R techniques. The compound crystallizes with monoclinic symmetry space group C 2h-P2j/n and the lattice parameters a = 5.292(2), b = 8.450(3), c = 7.737(3) Ä , ß = 96.33(3)°, Z = 2. Zn2 28M g072(A s O 4) 2 is isotypic to /3-Zn3(A s 0 4)2. The formation of the /3-Zn3(A s 0 4) 2 struc­ ture instead o f other possible orthoarsenates is discussed. 
  Reference    Z. Naturforsch. 51b, 469—472 (1996); eingegangen am 2. Oktober 1995 
  Published    1996 
  Keywords    Zinc, Magnesium, Arsenic, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0469.pdf 
 Identifier    ZNB-1996-51b-0469 
 Volume    51 
3Author    V-Requires cookie*
 Title    Zwei monokline Kupfer-Oxovanadate des Magnesiums mit geordneter Metallverteilung: /w-Mg2CuV20 8 und MgCu2V20 8. Ein Beitrag zur Dimorphie von Mg2CuV2Os Two Monoclinic Copper Oxovanadates of Magnesium Showing Ordered Metal Distribution: m-Mg9CuV-,08 and MgCu  
 Abstract    Single crystals of ra-Mg2CuV20 8 (I) and MgCu2V20 8 (II) have been prepared by solid state reactions. The orange (I) and dark red (II) crystals show monoclinic symmetry, space group C2h -P2,/c, (I): a = 6.167(3), b = 8.172(5), c = 6.400(8) Ä, ß = 116.22(3)°, Z = 2; (II): a = 6.453(1), b = 8.342(2), c = 11.517(2) Ä, ß = 90.44(2), Z = 4. Both compounds show ordered metal distributions and vanadium in tetrahedral coordination by oxygen. (I) is characterized by elongated C u06 octahedra and (II) by trigonal C u 0 5 bipyramids. ra-Mg2CuV20 8 is the low temperature form of the formerly investigated orthorhombic o-Mg2CuV2Ö8. Calculations of the Coulomb parts of the lattice energy of the two crystal forms are discussed. 
  Reference    Z. Naturforsch. 51b, 817—821 (1996); eingegangen am 4. Dezember 1995 
  Published    1996 
  Keywords    Magnesium, Copper, Vanadium Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0817.pdf 
 Identifier    ZNB-1996-51b-0817 
 Volume    51