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Figure 3
(a) The leucophoenicite structure viewed down [100]: the double octahedral layers stacking along the b axis are shown. (b) A fragment of the leucophoenicite crystal structure showing a possible configuration of the [(SiO4)(OH)2] cluster in the P21/a structure: when a Si1 site is occupied, the nearby equivalent position is vacant and two hydroxyls occur. (c) The serrated chains of Mn-octahedra, linked by Si-tetrahedra, in the P21/a structure model of leucophoenicite (mutually exclusive and symmetry-equivalent Si1 tetrahedra are shown in green) and (d) the same structural view in the P21 model, where the mutually exclusive and symmetry-independent Si11 and S12 tetrahedra are shown in light and dark green, respectively. These pictures have been created using Vesta software (Momma & Izumi, 2011BB33).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 1| January 2020| Pages 222-229
https://doi.org/10.1107/S1600577519015170
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