Borotellurites

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Borotellurites are chemical mixed anion compounds that contain any kind of borate and tellurite ions bound together via oxygen. They are distinct from borotellurates in which tellurium is in +6 oxidation state. There are also analogous boroselenites, with selenium instead of tellurium, and borosulfates containing sulfur. Borotellurites are colourless.

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chem mw crystal system space group unit cell volume density comments references
K3BaTeB7O15 monoclinic P21/c a=8.979 b=6.303 c=25.869 β=98.095° transparent above 235 nm [1]
LaTeBO5 357.32 orthorhombic Pbca a=10.8220 b=6.9216 c=11.5812 Z=8 867.50 5.472 colourless; large birefringence [2]
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