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Sudoit („dioktaedrischer Chlorit“, „Al-Chlorit“) im Cornberger Sandstein von Cornberg/Hessen by German Müller is a Earth and Planetary Sciences article available to read on EtoBox.

What is Sudoit („dioktaedrischer Chlorit“, „Al-Chlorit“) im Cornberger Sandstein von Cornberg/Hessen about?

Sudoite, muscovite, and quartz are authigenic minerals of the Cornberger Sandstein, the youngest eolian member of the uppermost Lower Permian. The sudoite is to a great extent similar to the material from the Kesselberg area (Black Forest, Germany). Sudoite appears in colourless flakes up to some microns in diameter having low refractive indices and a very low birefringenee. Probably, 2V x is also very low. Sudoite and 1 M-muscovite form aggregates of sand size but also fill pore spaces of the sandstone. X-ray and chemical investigations confirm that a dioctahedral tetraphormic phyllosilicate with a0=5.16A, b0=8,94A, d00~:14.14A exists in which AI is by large predominant in the oetahedral sheets. The 003-peak is the strongest basal reflection. The thermal behaviour of sudoite is similar to that of Mg-rich chlorites: between 400~50~ the intensity of the 001-reflection has increased more than twice. All other basal reflections have lost part of their intensity. At higher temperatures, all basal reflections ar e weakened; at 800~ the sudoite structure has disappeared. d(001 ) decreases with increasing temperature. Contrary to chlorites from sudoite no olivine, enstatite or spinel are

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Author

German Müller

Publisher

Springer; Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0010-7999)

Published

1967

Language

DE

Field

Earth and Planetary Sciences (Physical Sciences)