The richterite root name group includes:
fluoro-richterite:
Na(NaCa)Mg5Si8O22F2
potassic-fluoro-richterite:
K(NaCa)Mg5Si8O22F2
potassic-richterite:
K(NaCa)Mg5Si8O22(OH)2
richterite:
Na(NaCa)Mg5Si8O22(OH)2
The richterite root name group is a member of the
sodium-calcium amphibole subgroup
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