Manganoan Wallkilldellite, a Manganese Arsenate, from the Gozaisho Mine, Fukushima Prefecture, Japan.
| Accession number;01A1037011 |
| Title;Manganoan Wallkilldellite, a Manganese Arsenate, from the Gozaisho Mine, Fukushima Prefecture, Japan. |
| Author;MATSUBARA S(National Sci. Museum, Tokyo, Jpn) MIYAWAKI R(National Sci. Museum, Tokyo, Jpn) SUZUKI Y |
Journal Title;Bull Natl Sci Mus Ser C
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Journal Code:S0397B
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ISSN:0385-244X
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VOL.27;NO.1/2;PAGE.45-50(2001)
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| Figure&Table&Reference;FIG.1, TBL.3, REF.4 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Wallkilldellite is found in rhodonite-rhodochrosite-braunite ore from the Gozaisho mine, Fukushima Prefecture, in association with villyaellenite. The average chemical analysis of 5 analyses by EPMA gave CaO 8.89, MnO 34.06, CuO 0.67, SiO2 0.51, As2O5 28.92, H2O 26.95 (by difference) total 100wt.%, yielding the empirical formula (Ca2.45Mn1.55).SIGMA.4.00(Mn5.86Cu0.13).SIGMA.5.99(As3.88Si0.13).SIGMA.4.01O16(OH)8 19.08H2O on the basis of total cations=14 in anhydrous part. The strongest lines in the X-ray powder diffraction pattern by a Gandolfi camera are 11.7 (100) (002), 3.27 (85) (110), 2.90 (50) (008), 2.13 (60) (120; 121), and 1.632 (80) (220). The cell parameters in hexagonal symmetry calculated from the powder diffraction pattern are: a=6.52(1), c=23.1 (1) .ANGS., V=850.4 .ANGS.3. (author abst.) |
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