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Esperanzaite
Type Locality
La Esperanza Mine, Durango, Mexico
Mineral Data
NaCa
2
Al
2
(AsO
4
)
2
(OH)F
4
·2H
2
O
Strunz:
8.DM.05
Physical Properties
Crystal System:
Monoclinic
Hardness:
4.5
Tenacity:
brittle
