scholarly journals Hexahydroborite from Fuka, Okayama Prefecture, Japan.

1999 ◽  
Vol 21 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Isao KUSACHI ◽  
Yasushi TAKECHI ◽  
Shoichi KOBAYASHI ◽  
Junji YAMAKAWA ◽  
Yoshihiro NAKAMUTA ◽  
...  
Keyword(s):  
Okayama Prefecture

A NEUROEPIDEMIOLOGICAL STUDY OF CHILDHOOD EPILEPSY IN OKAYAMA PREFECTURE, JAPAN, BY THE NEWLY PROPOSED ILAE CLASSIFICATION IN 2001

2006 ◽  
Vol 37 (S 1) ◽  
Author(s):  
T Akiyama ◽  
K Kobayashi ◽  
T Ogino ◽  
H Yoshinaga ◽  
E Oka ◽  
...  
Keyword(s):  
Childhood Epilepsy ◽  
Okayama Prefecture ◽  
Ilae Classification

Szomolnokite and Mirabilite from Yanahara Mine, Okayama Prefecture

1958 ◽  
Vol 3 (5) ◽  
pp. 429-431
Author(s):  
Nagashi Ogushi ◽  
Akira Kato
Keyword(s):  
Okayama Prefecture

Seafloor environmental changes during the last 100 years resulting from reconstruction of the artificial lake in Kojima Bay, Okayama Prefecture

2012 ◽  
Vol 73 (3) ◽  
pp. 217-234 ◽  
Author(s):  
Atsuko AMANO ◽  
Guangzhe JIN ◽  
Shin-ichi ONODERA ◽  
Takaharu SATO ◽  
Yuta SHIMIZU ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Artificial Lake ◽  
Okayama Prefecture

Shimazakiite-4M and shimazakiite-4O, Ca2B2O5, two polytypes of a new mineral from Fuka, Okayama Prefecture, Japan

2013 ◽  
Vol 77 (1) ◽  
pp. 93-105 ◽  
Author(s):  
I. Kusachi ◽  
S. Kobayashi ◽  
Y. Takechi ◽  
Y. Nakamuta ◽  
T. Nagase ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Refractive Indices ◽  
New Mineral ◽  
Calcium Borate ◽  
Crystalline Limestone ◽  
Okayama Prefecture

AbstractShimazakiite occurs as greyish white aggregates up to 3 mm in diameter. Two polytypes, shimazakiite-4M and shimazakiite-4O, have been identified, the former in nanometre-sized twin lamellae and the latter in micrometre-sized lamellae. Shimazakiite was discovered in an irregular vein in crystalline limestone near gehlenite-spurrite skarns at Fuka mine, Okayama Prefecture, Japan. Associated minerals include takedaite, sibirskite, olshanskyite, parasibirskite, nifontovite, calcite and an uncharacterized hydrous calcium borate. The mineral is biaxial (–), with the following refractive indices (at 589 nm): α = 1.586(2), β = 1.650(2), γ = 1.667(2) and 2Vcalc = 53º [shimazakiite-4M]; and α = 1.584(2), β = 1.648(2), γ = 1.670(2) and 2Vcalc = 54.88º [shimazakiite-4O]. Quantitative electronmicroprobe analyses (means of 28 and 25 determinations) gave the empirical formulae Ca2B1.92O4.76(OH)0.24 and Ca2B1.92O4.76(OH)0.24 for shimazakiite-4M and shimazakiite-4O, respectively. The crystal structure refinements: P21/c, a = 3.5485(12), b = 6.352(2), c = 19.254(6) Å , β = 92.393(13)°, V = 433.6(3) Å3 [for shimazakiite-4M]; and P212121, a = 3.55645(8), b = 6.35194(15), c = 19.2534(5) Å , V = 434.941(18) Å3[for shimazakiite-4O], converged into R1 indices of 0.1273 and 0.0142, respectively. The crystal structure of shimazakiite consists of a layer containing B2O5 units (two near-coplanar triangular corner-sharing BO3 groups) and 6- and 7-coordinate Ca atoms. Different sequences in the c direction of four layers are observed in the polytypes. The five strongest lines in the powder-diffraction pattern [listed as d in Å (I)(hkl)] are: 3.02(84)(022); 2.92(100)(10) 2.81(56)(104); 2.76(32)(113); 1.880(32)(11,12,126,118) [for shimazakiite-4M]; and 3.84(33)(014); 3.02(42)(022); 2.86(100)(104); 2.79(29)(113); 1.903(44)(126,118) [for shimazakiite-4O].

scholarly journals Fedorovskite from the Fuka mine, Okayama Prefecture, Japan

2020 ◽  
Vol 115 (6) ◽  
pp. 479-484
Author(s):  
Shoichi KOBAYASHI ◽  
Fumiko HIGASHINO ◽  
Mitsuo TANABE ◽  
Shigetomo KISHI ◽  
Yoshinori ICHIHASHI ◽  
...  
Keyword(s):  
Okayama Prefecture

scholarly journals Kaersutite and pargasite in xenoliths included in monzodiorite at Fuka, Okayama Prefecture, Japan

2004 ◽  
Vol 33 (2) ◽  
pp. 46-50
Author(s):  
Akimasa OMAE ◽  
Isao KUSACHI ◽  
Shoichi KOBAYASHI
Keyword(s):  
Okayama Prefecture

scholarly journals An Epidemic of Swinepox in Okayama Prefecture

1988 ◽  
Vol 41 (12) ◽  
pp. 870-874
Author(s):  
MOTOAKI OUCHI ◽  
MITSUO FUJIWARA ◽  
YOSHIHIRO HATANO ◽  
MASAHIRO YAO ◽  
FUMIO UNO ◽  
...  
Keyword(s):  
Okayama Prefecture

scholarly journals Johnbaumite from Fuka, Okayama Prefecture, Japan.

1996 ◽  
Vol 18 (2) ◽  
pp. 60-66 ◽  
Author(s):  
Isao KUSACHI ◽  
Chiyoko HENMI ◽  
Shoichi KOBAYASHI
Keyword(s):  
Okayama Prefecture
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