What is it about?
The incommensurately modulated orthorhombic crystal structure of lazurite from the Baikal region is presented. It was solved in a pseudo cubic unit cell, a cub = 9.077(1) Å, and in the (3 + 2)D superspace group Pnn2(α α 0, α −α 0). The crystal is twinned with three components oriented along the [111] axis.
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Why is it important?
In addition the structure was also refined with trigonal symmetry R3.
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This page is a summary of: On the Symmetry of Optically Isotropic Modulated Lazurites from the Baikal Region, Ferroelectrics, January 2004, Taylor & Francis,
DOI: 10.1080/00150190490462478.
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