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Ktenasite, another mineral with ∞2[(Cu,Zn)2(OH)3O]− octahedral sheets
Published/Copyright:
August 25, 2010
Abstract
The crystal structure of ktenasite from Miniera Trentin (space group P 21/c, a = 5.589, b = 6.166, c = 23.751 Å, β = 95.55°) was determined by Patterson and Fourier methods and refined to a final R value of 0.058.
The structure is characterized by corrugated sheets ∞2[(Cu, Zn)2(OH)3O]− of distorted copper-zinc polyhedra. Sulphate groups are connected to both sides of the octahedral sheet by corner sharing. The resultant composite tetrahedraloctahedral layers are connected each other by [Zn(H2O)6]+2 octahedra through a system of hydrogen bonds. The crystal chemical formula for ktenasite from Miniera Trentin is Zn2(Cu5.2Zn2.8)(SO4)4(OH)12 · 12H2O.
The relations of ktenasite with other minerals are remarked and discussed.
Published Online: 2010-08-25
Published in Print: 1978
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