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Licensed Unlicensed Requires Authentication Published by De Gruyter (O) September 16, 2010

Strukturverfeinerung am Talk Mg3[(OH)2Si4O10]

Abstract

Because of discrepancies in the literature a redetermination of the structure of talc Mg3[(OH)2Si4O10] is reported. Space group of talc is P[unk] with lattice parameters a0 = 529.1(3) pm, b0 = 946.0(5) pm, c0 = 529.0(3)pm, α = 98.68(5)°, β = 119.90(5)° and γ = 85.27(5)°, Z = 2. Transformation by a′ = −c,b′ = 2a + c, c′ = −b leads to a pseudomonoclinic C-centred unit cell with layers of connected [SiO4]-tetrahedra parallel to (001). Two layers with opposite orientation provide for octahedral coordination polyhedra around Mg atoms.

Published Online: 2010-9-16
Published in Print: 1981-2-1

© 2015 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München

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