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Tumchaite
Type Locality
Vuoriyarvi alkaline-ultrabasic massif, Northern Karelia, Murmanskaja Oblast', Northern Region, Russia
Mineral Data
Na
2
Zr(Si
4
O
11
)·2H
2
O
Strunz:
9.EA.60
Physical Properties
Crystal System:
Monoclinic
Streak:
White
Hardness:
4.5
