Hi
Fundstelle Hokkejino ist in mindat verzeichnet.
Erste englischsprachige Beschreibung 1970:
Tosalite
Chemical analysis of the material from the Matsuo mine Kochi prefecture by H. Shirozu gave SiO2 32.09, TiO2 0.05, AI2O3 5.59, Fe2O3 4.13, FeO 34.73, MnO 9.85, CaO 0.04, MgO 2.04, Na2O 0.15, K2O 0.13, H2O+ 10.50, H2O- 0.59, wm99.897o, corresponding to the iron-richer member of 'bementite'.
Under the microscope, it is yellow green to bright green and the birefringence is variable. The optical data are not given. The X-ray powder data for the Matsuo material are very similar to those for 'bementite'.
It occurs in dark green massive aggregates composed of fine grains with rhodochrosite and locally with magnetite.
The name is for Tosa, the old district name of Kochi prefecture, Japan. Besides the original locality, six localities are known in Japan
Quelle:
Yoshimura, T., (1967) Supplement to manganese ore deposits of Japan. Part I. Manganese mineralization, minerals, and ores. Sci,. Rept. Fac. Sci. Kyushu (/nil., ser, D, 9, 1-485. [fn Japanese with English summary]. In.:
Fleischer, M., 1970; NEW MINERAL NAMES ; THE AMERICAN MINERALOGIST, VOL 55, MAY_JUNE, 1970
Gruß
collector