Journal of the Clay Science Society of Japan (in Japanese)
Online ISSN : 2186-3563
Print ISSN : 0470-6455
ISSN-L : 0470-6455
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Volume 11, Issue 3
Displaying 1-6 of 6 articles from this issue
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  • [title in Japanese]
    Touru KUBOTA
    1971 Volume 11 Issue 3 Pages 73-84
    Published: September 05, 1971
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.11.73
    JOURNAL FREE ACCESS
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  • An interstratified mineral of biotite and vermiculite from the Hase mine, Hitachi-ota city, Ibaragi Prefecture
    Susumu SHIMODA
    1971 Volume 11 Issue 3 Pages 85-94
    Published: September 05, 1971
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.11.85
    JOURNAL FREE ACCESS
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    An interstratified mineral of biotite and vermiculite (=hydrobiotite) was found as an alteration mineral of biotite at the Hase mine, Hitachi-ota city, Ibaragi Prefecture. The material used contains vermiculite as an impurity. Chemical composition: Si02 32.78%; TiO2 2. 36%; Al203, 20.38%; Fe2O3 3.96%; FeO 8.58%; Mn0 0.07%; MgO 16.47%; CaO 0.09%; Na2O 0.29%; K2O 3.97%; H2O+8.51 %; H20-2.75%; total 100.21%. Although the specimen contains vermiculite, the chemical composition is similar to that of biotite.
    The specimen gives a 26.7 Å reflection and its higher orders. The interstratification seems to be produced by a two component stacking of about 60% biotite-like layers and about 40% vermiculite-like layers.
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  • Cookeite in Petalite from Africa
    Shigeto KANAOKA, Etsuzo KATO
    1971 Volume 11 Issue 3 Pages 95-101
    Published: September 05, 1971
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.11.95
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    It was found that a pinkish and weathered stone in the stock of the petalite from Africa was composed of cookeite and quartz. Some mineralogical characteristics of the cookeite after refining were investigated.
    The structure formula of this cookeite induced from chemical composition is (Al1.991 Fe0.009)(OH) 2 (Al0.584 Si3.416) O100.584- (Li1.118 K0.036 Na0.171 Mg0.014 Ca0.063 Mn0.005 Al1.698)(OH) 60.583+. The basal spacing is 14.16Å, and does not change by the treatments with 6N-HCI, 1N-NH4NO3, potassium acetate, and ethylene glycol. The intensity of the reflection of (001) become maximum by heat treatment at 500°C. Only β-spodumen and mullite appear when heated at 1300°C.
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  • Hydrothermal Syntheses of a Large Crystal of Pyrophyllite
    Shigekazu UDAGAWA, Hiroyuki IKAWA, Kazuyori URABE
    1971 Volume 11 Issue 3 Pages 102-105
    Published: September 05, 1971
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.11.102
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    A large crystal of pyrophyllite was synthesized as pseudomorphs after vermiculite and muscovite under hydrothermal conditions at 450°C-550°C and 500 kg/cm2-water pressure. X-ray single crystal methods were applied to the synthetic pyrophyllite for obtaining its crystal structural informations. X-ray oscillation and Weissenberg photographs are indexed from the following unit cell: monoclinic; a=5. 14, b=8.94, c=18.40Å, β=100°. The synthetic pyrophyllite shows strong preferred orientation along its crystal axes and, in consequence, is considered to be a well ordered aggregate which could be regarded as equivalent to a single crystal.
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  • Clay mineralgy of the Kanto Loam Formation, near Narimasu, north-western suburb of Tokyo
    Takeshi MATSUI, Ken'ichi SAITO
    1971 Volume 11 Issue 3 Pages 106-108
    Published: September 05, 1971
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.11.106
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    Clay mineralogical composition of a composite profile of the. Kanto Loam Formation near Narimasu determined by the X-ray diffraction rasulted as follows;
    The uppermost humic soil and Tachikawa Loam were dominated by allophane with a little quantities of 14Å minerals. The Musashino Loam was composed by halloysite with allophane, the uppermost buried soil horizon being characterized by the relatively high crystallinity of halloysite, and the intercalated Tokyo pumice bed by allophane. The Shimosueyoshi Loam was dominated by halloysite associated with 14Å minerals, the uppermost buried soil horizon being weathered to the more advanced stage. These results supported as a whole the prevailing information (Kurahayashi and Tsuchiya, 1958).
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  • [title in Japanese]
    Tsuyoshi HAYASHI
    1971 Volume 11 Issue 3 Pages 109-113
    Published: September 05, 1971
    Released on J-STAGE: September 20, 2011
    DOIhttps://doi.org/10.11362/jcssjnendokagaku1961.11.109
    JOURNAL FREE ACCESS
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