Studies of the manganese oxide minerals. III. Psilomelane

Michael Fleischer

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Research Article| February 01, 1960

Studies of the manganese oxide minerals. III. Psilomelane^*

Michael Fleischer

U. S. Geological Survey, Washington 25, D. C.

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Author and Article Information

Michael Fleischer

U. S. Geological Survey, Washington 25, D. C.

Publisher: Mineralogical Society of America

Received: 29 May 1959

First Online: 09 Jul 2018

Online ISSN: 1945-3027

Print ISSN: 0003-004X

Mineralogical Society of America

American Mineralogist (1960) 45 (1-2): 176–187.

Abstract

Study of 14 analyses of psilomelane, including 7 new ones, verifies Wadsley's formula, (Ba,H₂O)₄Mn₁₀O₂₀. x-ray study of the products of dehydration shows that the water is lost zeolitically up to 500° C. and that the mineral is converted to hollandite at about 550° C. Thermogravimetric and differential thermal analysis curves are given for two analyzed samples.

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