巻号一覧
30 巻 (1990 - 1991)
- 4 号 p. 211-
- 3 号 p. 165-
- 2 号 p. 91-
- 1 号 p. 1-
30 巻, 1 号
選択された号の論文の9件中1～9を表示しています
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中牟田 義博1990 年 30 巻 1 号 p. 1-10
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーHeulandite-clinoptilolite series zeolites which are identified as heulandite type 1, heulandite type 2 and clinoptilolite by thermal analysis occur in the Tertiary sedimentary rocks distributed near Munakata, Fukuoka Prefecture. Their thermal and chemical data are given.
The relative intensity of (020) reflection of each specimen heated at the temperatures between 200 and 500°C is examined. The relations between heating temperatures and relative intensities of (020) reflections of heulandite and clinoptilolite reveal that the thermal stabilities increase continuously from heulandite type 1 to clinoptilolite through heulandite type 2.
In DTA curve, the zeolites of heulandite type 1 show two endothermic peaks at 120°C and 230-350°C, and those of heulandite type 2 and clinoptilolite show only one endothermic peak at 150°C, The endothermic peak at 120°C may be assigned to the loss of loosely bound water around monovalent cations, and the peak at 150°C to those around divalent cations. The endothermic peaks at 230-350°C may be assigned to the water loss reaction associated with the thermal change from A to B phases of heulandite.
Chemical properties of heulandite and clinoptilolite are investigated using R+/(R++R++)-Al/(Al+Si) diagram. The Munakata sepcimens have a wide range of Al/(Al+Si) ratios (0.18-0.26) and are rich in Ca. Clinoptilolite from Munakata area is identified as Ca-clinoptilolite. There is a continuous series between heulandite and Ca-clinoptilolite with R++2Al→2Si substitution, where monovalent cations (Na, K) are contained in the range of one to two in a unit formula on the basis of 72O. The zeolites of this series contain divalent cations less than four in a unit formula, and monovalent and divalent cations more than four in total amounts.
Clinoptilolite rich in Na and K has similar Al/(Al+Si) ratio with Ca-clinoptilolite, and it does not form a continuous series with heulandite.抄録全体を表示PDF形式でダウンロード (2594K) -
歌田 実, 清水 正明1990 年 30 巻 1 号 p. 11-18
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーIn the Izu Peninsula, central Japan, seventeen species of zeolites mainly occur in volcanic rocks and volcaniclastic sediments of Miocece to Pleistocene in age. Pervasive zeolites are wairakite, laumontite, heulandite, stilbite, and chabazite and minor are yugawaralite, scolecite, epistilbite. They occur in veins, fractures and druses and are zonally distributed in hydrothermal alteration zones trending NW-SE and NE-SW.
Na-zeolites such as clinoptilolite, mordenite, analcime and ferrierite mainly replace vitric materials in volcaniclastic sediments. They were probably formed by thermal effects of magma which intruded at very shallow places during Pliocene to Pleistocene age.
There are few localities of fibrous zeolites such as natrolite, mesolite, and thomsollite.抄録全体を表示PDF形式でダウンロード (4242K) -
小田 一郎, 吉村 尚久, 八幡 正弘1990 年 30 巻 1 号 p. 19-30
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーAnalcime is found as an alteration product in diagenetically and hydrothermally altered rocks. Wairakite and analcime-wairakite solid solution occur commonly in the geothermal area.
Analcime-wairakite series mimerals which are analcime, wairakite and minerals having the intermediate chemical compositions occur in the Neogene system of the Nishi-Iburi district, southwest Hokkaido. In this paper, the mineralogical properties such as refractive indices, chemical composition, X-ray data and morphology are described. The wairakites in boring cores increase in Δ2θ(2θ(004)-2θ(400)) with increasing depth and temperature. This fact shows that Al/Si ordering of wairakite proceeds with a rise in temperature. Na2O/CaO ratio of the analcime-wairakite series minerals decreases with burial depth. The plot of the minerals in natrolitewairakite-albite triangle diagram indicates that vacant immisicibility area in analcime-wairakite solid solution seems to be narrower than previous data.抄録全体を表示PDF形式でダウンロード (5908K) -
中島 和一, 松末 ルミ1990 年 30 巻 1 号 p. 31-38
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーHeulandite was synthesized without any natural seed from amorphous solids of the Na4K4Al8Si28O72·Aq-Ca4Al8Si28O72·Aq system (KH system) and the Na3.3K3.3Al6.6Si29.5O72·Aq-Ca3.3Al6.6Si29.5O72·Aq system (KF system). At PH2O=1, 000 bars and reaction time=50 days, heulandite was formed as a single phase in the temperature range lower than 275°C and coexisted with mordenite, analcime or wairakite in the range from 275 to 295°C. The compositional ranges of synthesized heulandites including those obtained previously in the clinoptilolite-epistilbite system are Si/Al=3.0-4.5 and Ca/(Ca+NaK)=0.4-1.0, and these ranges are not contradictory to those of natural heulandites.
The synthesized heulandites tend to change morphologically from prismatic to platy habit with increase of the Ca content. The result of heating treatment of the heulandites indicates that their thermal stability increases gradually with increasing the NaK or Si contents. The relationship between chemical composition and thermal behavior of the synthetic heulandites is similar to that of natural heulandites, and the above-mentioned thermal behaviors of the synthetic heulandites raise adoubt about the classification of heulandites based on their thermal behaviors such as heulandite type 1 and type 2 proposed by Alietti (1972).抄録全体を表示PDF形式でダウンロード (2674K) -
後藤 義昭1990 年 30 巻 1 号 p. 39-44
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーZeolite Y was treated with 0.1-5M NaOH solution at 100 and 150°C for various periods. The unit cell parameter of the treated zeolite Y was increased from 24.725 to 25.128Å as a result of the dissolution of SiO2. It seemed that the dissolution occurred in the place of 12-ring aperture. The treated zeolite was decomposed by heating at 800°C.抄録全体を表示PDF形式でダウンロード (600K) -
西戸 裕嗣1990 年 30 巻 1 号 p. 45-51
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーMineralogical data for dachiardites reported up to present and their mode of occurrence are summarized. All reliable analyses show a wide continuous range of chemical compositions: Si/(Al+Fe3+)=3.6-5.7, R2+/(R++R2+)=0.98-0.01. A complete solid solutionl series in dachiardite group minerals is expected. Electron diffraction analysis indicates the existence of various degree of stacking disorder in framework structure. Correlation between β-angle and Si/(Al+Fe3+) ratio is confirmed. Refractive indices, cΛΖ and 2V considerably vary among the samples, and closely relate to R2+/(R++R2+) ratio. In DTA curve, cation-exchange effect shows an alteration in endothermic peaks due to dehydration. High silica and high alkali contents lead to enhance thermal stability of dachiardite structure.抄録全体を表示PDF形式でダウンロード (2454K) -
歌田 実1990 年 30 巻 1 号 p. 52-56
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーFerrierite, magnesium containing high silica zeolite, is rarely found. But occurrence of ferrierite has been reported from more than twenty localities throughout the world. Ferrierite occurs not only in druses and veins of igneous rocks, but also in volcaniclastic sediments. In this paper the modes of occurence, genesis and mineralogical properties of ferrierite have been reviewed.抄録全体を表示PDF形式でダウンロード (451K) -
輝沸石-斜プチロル沸石, 方沸石-ワイラカイト, モルデナイトおよびフェリエライトの合成中島 和一, 上田 智1990 年 30 巻 1 号 p. 57-75
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーHeulandite-clinoptilolite, analcime-wairakite, mordenite and ferrierite are main natural zeolites which are widely distributed. We have reviewed histories of synthetic study on the main natural zeolites, and mineralogical properties and formation conditions of the natural zeolites synthesized.抄録全体を表示PDF形式でダウンロード (2425K) -
秋月 瑞彦1990 年 30 巻 1 号 p. 76-81
発行日: 1990/04/24
公開日: 2011/09/20
ジャーナル フリーSince the early 19th century it has been recognized that many minerals including zeolites show optical phenomena which are not in harmony with the apparent symmetry of their external morphology. The phenomenon has been called optical anomaly.
In low temperature aluminosilicates such as zeolites, various degrees of Al, Si ordering are produced by electron charge balance between alkali ions and Al, Si atoms on the crystal surface during growth. If Al, Si tetrahedron forms after the adsorption of alkali ions on crystal surface, the tetrahedron will be preferentially occupied with Al ion. On the other hand, if the tetrahedron forms prior to the alkali ion, it will be preferentially occupied by Si. If growth steps are inclined to mirror plane, Al, Si structure will be ordered with respect to the mirror plane, and the mirror will change into the twin plane. If the steps are normal to the mirror, the structure will be disordered, and the mirror will be maintained during growth. Therefore, zeolites consist of complicated sectors with various symmetries, and no single crystals are produced during growth.抄録全体を表示PDF形式でダウンロード (717K)
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