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3 citations found for Biryukov, Y

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Acta Cryst. (2019). A75, e267
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The Fe2+ to Fe3+ oxidation in oxoborates vonsenite and hulsite leads to a decrease of values of unit-cell volumes, volumetric thermal expansion coefficients and subsequent solid-phase decomposition. A partial magnetic ordering in hulsite is observed for the first time with Tc ∼383 K, which is accompanied with unusual changes of thermal expansion coefficients.

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Lu5Ba6B9O27 crystallizes in a new structure type in space group C2/c. The structure is disordered: one of the B atoms is surrounded by six O atoms with partial occupancies of 0.5, and this is the first example of a borate where the partial occupancy of only the O atoms is observed. Its thermal expansion is highly anisotropic. The negative linear expansion is parallel to the planes of the largest number of [BO3] triangles.

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