hiortdahlite
noun
hiort·dahl·ite
| \ ˈyȯ(r)tˌdäˌlīt, -dəˌl-\
plural -s
Definition of hiortdahlite
: a rare mineral (Ca,Na)13Zr3Si9(O,OH,F)33 consisting essentially of a sodium calcium zirconium silicate containing also fluorine and occurring as pale yellow tabular triclinic crystals
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