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Oriented transformation of malachite into tenorite
Published/Copyright:
August 25, 2010
Abstract
The transformation of malachite into tenorite has been studied by x-ray diffraction, differential thermal analysis and thermogravimetric methods. The transformation, topotactic in nature, was partial when malachite was heated at 220°C for about 70 hours and was complete on further heating at 350°C for 7 hours. The orientational relationship between the two phases was found to be [100]mal//[001]ten, [001]mal//[110]ten and [010]mal nearly parallel to [[unk]l0]ten. The mechanism involved consisted in complete expulsion of CO3 groups and protons from malachite structure and readjustment of oxygen and copper ions within the lattice.
Published Online: 2010-08-25
Published in Print: 1978
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- Bestimmung der Kristallstruktur von 6-methyl-2-oxo-1,2-diphenyl-3-oxa-2-phosphabicyclo[3,l,0]hexan (C17H17O2P)
- The crystal structure of C. I. Pigment Red 3, 4-methyl-2-nitrophenylazo-2-naphthol
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