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Low-iron cordierite in phlogopite schist from White Well, Western Australia

Published online by Cambridge University Press:  05 July 2018

M. W. Pryce*
Affiliation:
Government Chemical Laboratories, Perth, Western Australia

Summary

Pale-blue cordierite (complete analysis given; shows total iron oxides only 0·98 %) occurs in phlogopite schist near White Well (24° 28′ 30″ S. 116° 2′ E.) 20 miles north-west of Yinnietharra, Western Australia. Associated minerals are corundum, dravite, and sillimanite, accessory zircon and rutile. The cordierite is in translucent masses to 8 ×8×4 cm with vitreous lustre, D 2·57, α 1.536, β 1·540, γ 1·543, all colourless, 2Vα80° Unit cell a 17·055, b 9·724, c 9·350 Å. The host phlogopite (complete analysis given) is in brown flakes to 1 cm, D 2·88, α 1·558, β 1·585, γ 1·59, 2Vα 5–20° 1 M polymorph.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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References

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