Tags: Chemical Substance, Mineral.
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 garnet variety in which a Si4+ is missing from a tetrahedral site.
