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Tincalconite

Tincalconite is a mineral closely related to borax, and is a secondary mineral that forms if borax is allowed to dry. The crystal shape of borax does not change during the drying process. Its formula is Na2B4O5(OH)4 – 3H2O or Na2B4O7 – 5H2O.

While most tincalconite is created by man through exposing borax to dry air, there are natural occurrences of tincalconite, like in Searles Lake, California.

Tincalconite


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