Heulandite-Sr

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Heulandite-Sr

Whitesmith section, Strontian mine, Strontian, Highland Region, Scotland

Reference: 680

Heulandite-Sr is an uncommon zeolite mineral at Strontian mines and only found in the Whitesmith opencut. The specimen has a group of glassy heulandite-Sr crystals up to 6mm in length associated with pyrite and platey calcite. The calcite fluorecses red under SW UV light

Formula: (Sr,Na,Ca) _2-3 Al₃(Al,Si) ₂Si₁₃O₃₆^. 12H₂O