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Über die topochemische einphasige Reduktion von γ-MnO2

✍ Scribed by W. Feitknecht; H. R. Oswald; U. Feitknecht-Steinmann

Publisher
John Wiley and Sons
Year
1960
Tongue
German
Weight
247 KB
Volume
43
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

γ‐MnO~2~ can be partly reduced with N~2~H~2~ without changing its lattice. The volume of the elementary cell increases approximatly linearly with decreasing Mn^IV^ content. It is assumed that the reduction occurs in a one phase topochemical reaction, electrons and protons migrating through the lattice according to the formula

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The reduction of y-MnO, with cinnamic alcohol in xylene a t 90" leads (1) to y-MnOOH in a double phase reaction with germination if the y-MnO, is extremely disperse, and (2) to u-MnOOH in a strictly topotactical (single phase) reaction without germination if the y-MnO, is relatively well crystallise