Hydrogrossular is a calcium aluminium garnet series (formula: Ca3Al2(SiO4)3−x(OH)4x, with hydroxide (OH) partially replacing silica (SiO4)). The endmembers of the hydrogarnet family (grossular, hibschite, and katoite) depend on the degree of substitution (x): grossular: x = 0 hibschite: 0.2 < x < 1.5 katoite: 1.5 < x < 3.
Hydrogrossular is a calcium aluminium garnet series (formula: Ca3Al2(SiO4)3−x(OH)4x, with hydroxide (OH) partially replacing silica (SiO4)). The endmembers of the hydrogarnet family (grossular, hibschite, and katoite) depend on the degree of substitution (x): grossular: x = 0 hibschite: 0.2 < x < 1.5 katoite: 1.5 < x < 3.
Source: Wikipedia "Hydrogrossular" · CC BY-SA 4.0
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