The crystal structure of carminite: refinement and bond valence calculations
- 1 October 1996
- journal article
- Published by Mineralogical Society in Mineralogical Magazine
- Vol. 60 (402) , 805-811
- https://doi.org/10.1180/minmag.1996.060.402.11
Abstract
The crystal structure of carminite, PbFe2(AsO4)2(OH)2 has been refined. The mineral is orthorhombic, Cccm with a = 16.591(2), b = 7.580(1), c = 12.285(1) Å, Z = 8; the structure has been refined to a conventional R = 3.3% using 913 observed reflections [I>2σ(I)]. The structure contains stepped chains of edge-sharing pairs of Fe(O,OH)6 octahedra; these chains are linked by AsO4 tetrahedra and Pb atoms in distorted square antiprismatic co-ordination. The hydrogen bonding network in the structure has been modelled using bond valence calculations.Keywords
This publication has 3 references indexed in Scilit:
- Chemical and steric constraints in inorganic solidsActa crystallographica Section B, Structural science, crystal engineering and materials, 1992
- On enantiomorph-polarity estimationActa Crystallographica Section A Foundations of Crystallography, 1983
- The absorption correction in crystal structure analysisActa Crystallographica, 1965