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1956•Mineralogical Magazine and Journal of the Mineralogical SocietyRequires access

Birnessite, a new manganese oxide mineral from Aberdeenshire, Scotland

L. H. P. Jones, Angela A. Milne

Open publisher page 130 citations

Abstract

Summary A manganese pan near Birness contains grains of an optically uniaxial negative mineral near (Na 0·7 Ca 0·3 )Mn 7 O 14· 2·8H 2 O, giving an X-ray powder pattern similar to that of synthetic materials described as ‘manganous manganite’ and δ-MnO 2 . Material giving a similar pattern has been described from a natural occurrence in Canada, but no mineral name was assigned; the name birnessite is now proposed. The mineral is probably formed by air-oxidation of manganous oxides under alkaline conditions.

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What this paper is about

Summary A manganese pan near Birness contains grains of an optically uniaxial negative mineral near (Na 0·7 Ca 0·3 )Mn 7 O 14· 2·8H 2 O, giving an X-ray powder pattern similar to that of synthetic materials described as ‘manganous manganite’ and δ-MnO 2 . Material giving a similar pattern has been described from a natural occurrence in Canada, but no mineral name was assigned; the name birnessite is now proposed. The mineral is probably formed by air-oxidation of manganous oxides under alkaline conditions.

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Available abstract

Summary A manganese pan near Birness contains grains of an optically uniaxial negative mineral near (Na 0·7 Ca 0·3 )Mn 7 O 14· 2·8H 2 O, giving an X-ray powder pattern similar to that of synthetic materials described as ‘manganous manganite’ and δ-MnO 2 . Material giving a similar pattern has been described from a natural occurrence in Canada, but no mineral name was assigned; the name birnessite is now proposed. The mineral is probably formed by air-oxidation of manganous oxides under alkaline conditions.

Key concepts: Birnessite, Manganese, Mineral, Manganite, Manganese oxide, Mineralogy, Oxide, Inorganic chemistry

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