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Synthesis, crystal structure features, IR-spectrocopy and properties of natural calcium metaborates synthetic analogs and new Na,Ca carbonate–borateстатья
- Авторы: Yamnova N.A., Gurbanova O.V., Borovikova E.Yu, Volkov A.S., Dimitrova O.V.
- Сборник: Experiment in Geosciences
- Том: 22
- Год издания: 2016
- Место издания: IEM RUS C h e r n o g o l o v k a
- Первая страница: 56
- Последняя страница: 56
- Аннотация: The hexahydroborite analog Ca[B(OH)4]2·2Н2О (I), fabianite dimorph synthetic СаВ3O5(ОН) (II), and new Са,Na-carbonate-borate Ca2Na(NaxCa0.5–x)[(OH)(O1–xOHx)](CO3)(x~0.4) (III) have been synthesized by the hydrothermal method at t = 250°C and P = 70–80 atm: (I) via the recrystallization of calciborite CaB2O4 (M) in the system M–B2O3–H2O, (II,III) in the system Са(OH)2–H3BO3–Na2CO3–NaCl. The crystal structures of three borates were refined by the least-squares method with anisotropic displacement parameters (H atoms were located) and final R1 = 0.0260(I), 0.0428(II), 0.0387(III). Keywords:calcium metaborate, hydrothermal method, hexahydroborate, fabianite, carbonate-borate, nonlinear-optical properties
- Добавил в систему: Ямнова Наталия Аркадьевна