Abstract
Ertixiite (Na2Si4O9), a new mineral found in a miarolitic cavity of the Altay Pegmatite Mine, Xinjiang, China, is associated with topaz, apatite, quartz, cleavelandite, etc. The mineral is white, granular, and transparent. HNV=570.08−850.96 kg/mm2 (Moh’s 5.8−6.5), D=2.35, N=1.502. Cubic system,a=5.975 Å, V=213.311 Å, Z=1,D x =2.34g/cm3.
The chemical composition of ertixiite (the average of six samples) is: Na2O 17.97, CaO 2.82, SiO2 77.86, Al2O3 1.45, FeO 0.05, total 100.15.
The strongest lines in the X-ray powder pattern are 3.443(2, 111), 2.647(2. 210), 2.674(2,210), 1.996(8,221), 1.798(10,311), and 1.492(2,400).
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References
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Zhang Rubo, Geological Review, 27, 1(1981), 1–7 (in Chinese with English abstract).
Zhang Rubo, Acta Mineralogica Sinica, 4(1983), 313–317.
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Zhang, R., Han, F. & Du, C. Ertixiite—a new mineral from the Altay Pegmatite Mine, Xinjiang, China. Geochemistry 4, 192–195 (1985). https://doi.org/10.1007/BF03179339
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DOI: https://doi.org/10.1007/BF03179339