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Sheldrickite

Type Locality
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Mineral Data
NaCa3(CO3)2F3·H2O
Strunz: 
5.DC.15
Physical Properties
Crystal System: 
Trigonal
Hardness: 
3.0