- 著者
- Hidemichi HORI Eiji KOYAMA Kozo NAGASHIMA
- 出版者
- Japan Association of Mineralogical Sciences
- 雑誌
- Mineralogical Journal (ISSN:05442540)
- 巻号頁・発行日
- vol.10, no.7, pp.333-337, 1981 (Released:2007-03-31)
- 参考文献数
- 11
- 被引用文献数
- 10
Kinichilite, a new mineral from the Kawazu mine, is hexagonal with a=9.419 Å, c=7.666 Å, space group P63 or P63⁄m. The empirical formula derived from the chemical analysis is: (Fe2+1.13Mg0.47Zn0.43Mn2+0.17)Σ2.20(Te2.97Se0.03)Σ3.00 O9.00(H1.38Na0.22)Σ1.60·3.2H2O, corresponding to Fe2+ dominant analogue of zemannite.It is dark brown in colour. Subadamantine luster and brown streak. No cleavage. Density (calc.) 3.96 g/cm3 from normalized empirical formula and Z=2.
- 著者
- SATOSHI MATSUBARA KOZO NAGASHIMA
- 出版者
- Japan Association of Mineralogical Sciences
- 雑誌
- Mineralogical Journal (ISSN:05442540)
- 巻号頁・発行日
- vol.7, no.6, pp.513-525, 1975 (Released:2008-03-18)
- 参考文献数
- 15
- 被引用文献数
- 5 5
Orthoericssonite, BaMn2+2Fe3+ [O|OH|Si2 O7], hitherto reported only from the Långban mine, Sweden, was found in a jacobsite-bearing rhodonite-aegirine-tephroite ore from the Hijikuzu mine, Iwate Prefecture, as a product of strong thermal metamorphism due to granitic intrusion. It is orthorhombic, space group Pmmn, a0=20.30Å, b0=6.986Å, c0=5.387Å, Z =4. Wet chemical analysis by K. N. gives the empirical formula (Ba0.688Sr0.256K0.024Na0.013Li0.003)0.984(Mn1.4352+Fe0.5462+Mg0.086)2.067(Fe0.9313+Ti0.093Al0.034)1.058Si2.062 O7.000(O1.389(OH)0.611)2.000 as O=9, specifying it as a strontian and ferroan variety. It is optically biaxial positive, 2V about 50°, r ?? v strong, ns α=1.802, β=1.840, γ=1.888; strongly pleochroic, X=yellowish brown, Y=reddish brown, and Z=dark brown.
- 著者
- KAZUNOSUKE MASUTOMI KOZO NAGASHIMA AKIRA KATO
- 出版者
- Japan Association of Mineralogical Sciences
- 雑誌
- Mineralogical Journal (ISSN:05442540)
- 巻号頁・発行日
- vol.3, no.3, pp.139-147, 1961 (Released:2008-03-18)
- 参考文献数
- 12
- 被引用文献数
- 1 2
A black prismatic kobeitc-like mineral from a granite pegmatite of the Ushio mine in Ômiya town, Kyoto Prefecture and the kobeite from the original locality have been studied. Both the chemical analyses and the X-ray powder patterns of heated materials of the two minerals gave the concordant results. The two minerals contain notable amount of zirconium and after heat treatment give X-ray patterns similar to those of stabilized cubic zirconia. Kobeite will not be a member of the euxenite-polycrase series but may be a distinct mineral species of multiple oxide containing Y, Fe, U, Ti, Zr and Nb as the main components.
- 著者
- Kazuo HARADA Mariko HONDA Kozo NAGASHIMA Satoshi KANISAWA
- 出版者
- Japan Association of Mineralogical Sciences
- 雑誌
- Mineralogical Journal (ISSN:05442540)
- 巻号頁・発行日
- vol.8, no.2, pp.95-109, 1976 (Released:2007-03-31)
- 参考文献数
- 28
- 被引用文献数
- 8 14
A new mineral with the following formula is described: (K1.788Na0.148 Rb0.141)(Li2.536Mn2+0.985Fe2+0.183Fe3+0.061Al1.958Ti0.012) (Si6.646 Al1.354)·O19.634 (F3.159 (OH)1.202)=(K, Na, Rb)2.077(Li, Mn, Fe2+, Fe3+, Al, Ti)5.735(Si, Al)8.000·O19.639 (F, OH)4.361 as OH+O+F=24. It corresponds to manganese analogue of zinnwaldite and is expressed by a K2(Mn2+2−1Li2−3Al2) (Al2−1Si6−7O20) (F2−3 (OH)1−2). The name masutomilite is proposed for the material with Mn2+> Fe2+ in honor of Dr. Kazunosuke Masutomi for his contribution to minerals of Japan.X-ray powder diffraction and optical data indicate the mineral to be monoclinic, space group Cm or C2⁄m with a 5.253(8)Å, b 9.085(4)Å, c 10.108(8)Å, β 100.15(0.03)°, V 474.84(0.56)Å3 and Z=1. The precession method verified the space group. The strongest lines in the X-ray powder pattern are 10.10(72)(001), 3.64(43)(-112), 3.32(100)(003), 3.09(58)(112), 2.903(35)(-113, 031), 2.589(17)(200, -131), 1.989(46)(005), 1.653(23)(204, -135). It is pale purplish pink. Transparent. Cleavage {001} perfect. Hardness (Mohs) 2.5. Sp. Gr. (meas.) 2.94 and 2.96 (calc). Optically biaxial negative with α 1.534, β 1.569, γ 1.570, (−)2V 29°–31°, r>v very weak, X, Z colorless to pale purple, Y purple, absorption X<Z<Y. Optical orientation b=Y, X nearly perpendicular to (001), a∧Z 3°.The mineral occupies core part of a zoned single mica crystal up to 10 cm across and 1 cm thick found in a druse of granite pegmatite at Tanakamiyama, Otsu, Shiga Prefecture, Japan. The outer part of the crystal is a brown manganoan zinnwaldite. The associated minerals are topaz, schorl, albite and quartz.For comparison of a high manganese zinnwaldite with masutomilite, a mica from Tawara, Naégi district, Hirukawa-mura, Gifu Prefecture, Japan is also described.A complete solid solubility does exist for the masutomilite–lepidolite–zinnwaldite series. The relationship between chemical composition, unit-cell dimensions a or b, and optical properties for the masutomilite–lepidolite series is figured out.
- 著者
- Manabu YAMADA Ritsuro MIYAWAKI Izumi NAKAI Fujio IZUMI Kozo NAGASHIMA
- 出版者
- Japan Association of Mineralogical Sciences
- 雑誌
- Mineralogical Journal (ISSN:05442540)
- 巻号頁・発行日
- vol.20, no.3, pp.105-112, 1998 (Released:2007-03-31)
- 参考文献数
- 11
- 被引用文献数
- 1 9
The crystal structure of ammonioleucite was refined by a Rietveld analysis using X-ray diffraction data of the type specimen. The refinement with a space group I4l/a was converged at Rwp=12.12, Rp=9.39, RF=4.86, RB=7.71, and Re=2.55% with lattice parameters of a=13.2106(6) and c=13.7210(7) Å. Ammonioleucite is isostructural with leucite. The (Si, Al)O4 tetrahedra form 4-, 6-, and 8-membered rings by sharing their apical oxygen atoms. The crystal structure consists of the three-dimensional framework of the rings of the tetrahedra. Ammonium ions are located in cavities in the framework. The (NH4)+ ions in these cavities are larger than the corresponding K+ ions in leucite, causing the cavities to be enlarged relative to those in leucite. Among the 4-, 6-, and 8-membered rings of (Si,Al)O4 tetrahedra, only the 8-membered rings have diameters large enough to allow the migration of exchangeable K+, (NH4)+ and Na+ ions.