celadonite
mineral
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mica mineral group
- In clay mineral: Mica mineral group
Celadonite and glauconite are ferric iron-rich species of dioctahedral micas. The ideal composition of celadonite may be expressed by K(Mg, Fe3+)(Si4 - xAlx)O10(OH)2, where x = 0–0.2. Glauconite is a dioctahedral mica species with tetrahedral Al substitution greater than 0.2 and octahedral Fe3+ or R3+
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