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Mineral: Selenite

Notes

A transparent crystal form of the mineral gypsum. This can occur in clays and is the cause of efflorescence.

Out Bound Links

  • (Glossary) Efflorescence

    A term describing the whitish or brownish scum (depending on iron content) left on the surface of a fired clay body (most often red earthenware or raw stoneware and fireclays). Many clays contain soluble sulphates that are left on the surface after having been left there by water that has subsequent...

  • (Minerals - Related) Gypsum, Calcium sulphate

    CaSO4 2H2O is the crystalline mineral from which plaster is made. It is not practical as a source of CaO in glazes because its decomposition produces SO3 which is dangerous to health and it is destruc...

  • (URLs) Selenite at Wikipedia

    http://en.wikipedia.org/wiki/Selenite

In Bound Links

  • (Temperatures) Sulfur evolution (425C-650C)

    This happens on first fire for many bodies. Sulfur is an impurity in many ball clays and related stoneware and earthenware raw clays, it occurs as cal...


By Tony Hansen




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