Chemical composition of bakerite from Fuka, Okayama Prefecture, Japan
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Bakerite has been found as a vein-forming mineral in crystalline limestone near gehlenite-spurrite skarns at Fuka, Okayama Prefecture. The wet chemical analysis, EPMA, and IMA of the mineral yield an empirical formula Ca<SUB>8.036</SUB>B<SUB>9.963</SUB>Si<SUB>6.033</SUB>O<SUB>30.092</SUB>(OH)<SUB>9.908</SUB> on the basis of O=40. The present data supports the chemical formula calculated by Palache <I>et al.</I> (1951) rather than that for natural specimens given by Giles (1903); Kramer and Allen (1956); Baysal and Dilekoz (1975). The DTA and TG curves, and IR spectrum are also measured. The optical and X-ray diffraction properties agree with previous data.<BR>Bakerite from Fuka may be primarily formed under a low temperature hydrothermal condition.
- Mineralogical Journal
Mineralogical Journal 17(3), 111-117, 1994-07-01
Japan Association of Mineralogical Sciences