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Heidornite
Type Locality
Frenswegen 3 deep bore, Frenswegen, Nordhorn, Lower Saxony, Germany
Mineral Data
Na
2
Ca
3
B
5
O
8
(SO
4
)
2
Cl(OH)
2
Strunz:
6.EC.30
Physical Properties
Hardness:
4.0 - 5.0
