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Hiortdahlite

Mineral Data
(Ca,Na)3(Zr,Ti)(Si2O7)(O,OH,F)2
Strunz: 
9.BE.17
Physical Properties
Colour: 
Yellow, yellowish-brown
Crystal System: 
Triclinic
Hardness: 
5 - 5½
Synonyms
Synonyms: 
Hiortdahlit
Photos