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Thermogravimetric analysis of the copper silicate mineral dioptase Cu6[Si6O18]·6H2O

✍ Scribed by Ray L. Frost, Yunfei Xi

Book ID
120744142
Publisher
Springer Netherlands
Year
2012
Tongue
English
Weight
378 KB
Volume
112
Category
Article
ISSN
0022-5215

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The normal modes of vibration and their frequencies are calculated for dioptase, a mineral whose crystal structure (space group R3 or C~i ) consists of puckered six-membered silicate rings (Si6Ols) linked by Cu 2 § ions and HaO groups. The calculation employs a valence force potential consisting of