Thermal expansivities and compressibilities of hydrous phases in the system MgO-SiO2-H2O: Talc, phase A and 10-angstrom phase

Journal article

We have measured the thermal expansivity of talc, Mg3Si4O10(OH)2, and phase A, Mg7Si2O8(OH)6, and the compressibility of talc, phase A and 10-Å phase, Mg3Si4O10(OH)2 · xH2O, using powder X-ray diffraction. The thermal expansivity of talc and phase A were measured at temperatures up to 810°C and 600° C, respectively. Volumes of both phases increase linearly with temperature, and can be described as follows: Talc: V/V0 = 1 + 2.15 (± 0.05) × 10-5 (T - 298), V0 = 136.52 (± 0.03) cm3 mol-1; Phase ...

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Authors: Pawley, A; Redfern, S; Wood, B

• Publication status: Published
• Journal: CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
• Volume: 122
• Issue: 3
• Pages: 301-307
• Publication date: 1995-12-01
• DOI: 10.1007/s004100050129
• EISSN: 1432-0967
• ISSN: 0010-7999
• Language: English