Author: Garvie L.A.J.

Source: Mineralogical Magazine, Volume 63, Number 5, 1 October 1999 , pp. 757-757(1)

Publisher: Mineralogical Society

Abstract:

Sideronatrite [Na₂Fe(SO₄)₂(OH).3H₂O] occurs as yellow botryoidal encrustations on low cliffs of weathered pyrite-bearing mudstones at Barton-on-Sea, Hampshire, England. Extensive areas of the cliffs, up to ~100 m², are coated with sideronatrite and its low solubility in cold water secures its longevity. Dry samples of sideronatrite convert readily to metasideronatrite [Na₂Fe(SO₄)₂(OH).H₂O], the reaction to sideronatrite being reversible. Sideronatrite, it is suggested, forms as a result of weathering of pyrite that is present in the argillaceous sediments and reaction with Na from the sea-salt spray.

Language: English

Document Type: Research article

Publication date: 1999-10-01

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