(Ga,Ge)-Analogue of Tourmaline: Crystal Structure and Composition

Pushcharovsky D. Yu; Zubkova N. V; Setkova T. V; Balitskii V. S.; Nekrasov A. N.; Nesterova V. A.

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(Ga,Ge)-Analogue of Tourmaline: Crystal Structure and Composition

机译：（GA，GE） - 电气石的Alogue：晶体结构和组成

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Crystals of a (Ga,Ge)-analogue of tourmaline have been synthesized by hydrothermal method in the temperature range of 600-650 degrees C under a pressure of 100 MPa. The composition is analyzed, and the structure of single crystals is determined by X-ray diffraction (XRD) analysis. The rhombohedral-cell parameters are found to be a = 16.0102(4) angstrom, c = 7.18423(19) angstrom, sp. gr. R3m, and Z = 3. The distribution of cations over nonequivalent sites in the structure under study is determined to be as follows: Na-0.57(Al1.20Ga1.20Fe0.602+)(Al4.728Fe1.202+Ti0.072)((Si4.80Ge0.78Al0.42)O-18)(BO3)(3)(OH)(3)(O0.42OH0.58). The results obtained confirm possibility for obtaining Ge-substituted crystals with tourmaline structure, which (by analogy with the Ge-analogue of quartz) exhibit high piezo- and pyroelectric properties.

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来源
《Crystallography reports》 |2020年第6期|共8页
作者
Pushcharovsky D. Yu; Zubkova N. V; Setkova T. V; Balitskii V. S.; Nekrasov A. N.; Nesterova V. A.;
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Moscow MV Lomonosov State Univ Geol Dept Moscow 119899 Russia;

Moscow MV Lomonosov State Univ Geol Dept Moscow 119899 Russia;

Russian Acad Sci Inst Expt Mineral Chernogolovka 142432 Moscow Oblast Russia;

Russian Acad Sci Inst Expt Mineral Chernogolovka 142432 Moscow Oblast Russia;

Russian Acad Sci Inst Expt Mineral Chernogolovka 142432 Moscow Oblast Russia;

Moscow MV Lomonosov State Univ Geol Dept Moscow 119899 Russia;

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中图分类晶体学;
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(Ga,Ge)-Analogue of Tourmaline: Crystal Structure and Composition

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