Abstract The isotypic triel borates Al5B12O25(OH) and Ga4InB12O25(OH) were synthesized in a Walker-type multianvil apparatus under high-pressure/high-temperature conditions of 12.0 GPa/1400 °C and 12.3 GPa/1200 °C, respectively. The crystal structures of both compounds, determined by single-crystal X-ray diffraction, constitute new representatives of the structure type M 5B12O25(OH) (M = Ga, In) crystallizing in the space group I41/acd. The presence of the hydroxyl groups was confirmed via single-crystal IR spectroscopy.

中文翻译：

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Al5B12O25(OH) 和 Ga4InB12O25(OH)——另外两种结构类型为 M5B12O25(OH) (M = Ga, In) 的硼酸三醇

摘要 在Walker 型多砧装置中，分别在12.0 GPa/1400 °C 和12.3 GPa/1200 °C 的高压/高温条件下合成了同型三元硼酸盐Al5B12O25(OH)和Ga4InB12O25(OH)。通过单晶 X 射线衍射确定的两种化合物的晶体结构构成了在空间群 I41/acd 中结晶的结构类型 M 5B12O25(OH) (M = Ga, In) 的新代表。通过单晶红外光谱证实了羟基的存在。