On the existence of monoclinic NaAlSi3O8 s at elevated temperatures
Published online by Cambridge University Press: 14 March 2018
Summary
Measurements from powder diffraction patterns recorded at temperatures up to 950° C for the supposed equilibrium forms of albite synthesized at 800°, 900°, and 1000° C by MacKenzie (1957) indicate that only the form synthesized at 1000° C becomes monoclinic. Single-crystal measurements on heated pure natural albite (Ab99·26) show that it becomes truly monoclinic, both in geometry and intensity distribution, at 930° C, the same temperature as for the highest-temperature synthetic form. These experiments were carried out in conditions that exclude possible contamination by potassium.
- Type
- Research Article
- Information
- Mineralogical magazine and journal of the Mineralogical Society , Volume 36 , Issue 277 , March 1967 , pp. 83 - 88
- Copyright
- Copyright © The Mineralogical Society of Great Britain and Ireland 1967
References
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