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1983 (1)
1Author    Klaus Brodersen, Hans-U HummelRequires cookie*
 Title    Die Kristallstrukturell von CaHg(SCN)4 * /ili20 (n = 2,3). Verwandtschaftsbeziehungen zwischen den Verbindungsklassen der Tetrathiocyanatomercurate(II) von Erdalkaliionen und 3 d-Metallionen The Crystal Structures of CaHg(SCN)4 * MH20 (n = 2, 3). Relations between Tetrathiocyanatomercurates(II) of the Alkaline-Earth-Ions and Ions of the 3 d-Type  
 Abstract    CaHg(SCN)4 • nH20 (n — 2(1), n = 3(2)) were isolated from an aqueous solution of Ca(NCS)2 • 4H20 and Hg(SCN)2. 1 is compared with the analogous MgHg(SCN)4 • 2H20 by means of powder patterns. The crystal structure of 2 has been determined. 2 is mono-clinic, space group P2i/c with a = 9.469(4), 6 = 22.781(5), c = 6.587(4) A, 0 = 93.6(3)°, Z = 4, dc = 2.46 g-cm -3 . The structure was refined to .ß=7.42 and i?w = 4.96% for 1224 independent reflec-tions. The species MHg(SCN)4 • 2H20 (M = Mg, Ca, Ni) contain nearly tetrahedral Hg(SCN)4 and octahedral M(OH2)2(NCS)4 groups which are joined by Hg-SCN-M bridges. In contrast the structures of the other compounds MHg(SCN)4 • nH20 (M = Co, n = 0; M = Ca, Sr, n = 3) are based on the diamond net. There is tetrahedral coordination of all the metal atoms, M having 4 N and Hg 4 S nearest neighbours. In the hydrates the H20 molecules are situated additionally at the Ca and Sr atoms [*]. 
  Reference    Z. Naturforsch. 38b, 911—916 (1983); eingegangen am 20. April 1983 
  Published    1983 
  Keywords    Calciumtetrathiocyanatomercurates(II), Dihydrate, Trihydrate, X-Ray 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0911.pdf 
 Identifier    ZNB-1983-38b-0911 
 Volume    38