The crystal structure of some chamosite minerals (With Plate XII) | Mineralogical magazine and journal of the Mineralogical Society | Cambridge Core (original) (raw)

Extract

Chamosite is a commonly occurring hydrous ferrous silicate frequently found in close association with chalybite in marine mudstone deposits, the composition of different beds ranging from almost pure chamosite to pure chalybite. In oolitic ironstones chamosite is found both in the ooliths themselves and also in the groundmass. It occurs as a constituent in shales, as a cementing mineral in sandstones, and is occasionally found in lateritic and other deposits. Mineralogically it is usually regarded as a chlorite, or akin to the chlorites, but evidence has been accumulating which tends to show that some varieties may not be chlorites at all, but are probably closely related to the kaolin group of minerals (Brindley, 1949).

References

Bannister, (F.A.) and Whittard, (W.F.), 1945. A magnesian chamosite from… Gloucestershire. Min. Mag, vol. 27, pp. 99-111.Google Scholar

Brindley, (G.W.), 1949. Mineralogy and crystal structure of chamosite. Nature, London, vol. 164, pp. 319-320. [M.A. ll-104.]Google Scholar

Brindley, (G.W.), and Robinson, (K.), 1946. The structure of kaolinite. Min. Mag., vol. 27, pp. 242-253.Google Scholar

Brindley, (G.W.), and Ali, (S.Z.), 1950. X-ray study of thermal transformations in some magnesian chlorite minerals. Acta Cryst., vol. 3, pp. 25-30. [M.A. 11-104.]Google Scholar

Brindley, (G.W.), and YOUELL (R. F.). Thermal and X-ray studies of chamosite and chlorites. (To be published.)Google Scholar

Engelhardt, (W. von), 1942. Die Strukturen yon Thuringit, Bavalit und Chamosit und ihre Stellung in der Chloritgruppe. Zeits. Krist., vol. 104, pp. 142-159. [M.A. 8-291.lGoogle Scholar

Grimshaw, (R.W.), Heaton, (E.), and Roberts, (A.L.), 1945. The constitution of refractory clays. Trans. Brit. Ceramic Soc., vol. 44, pp. 69-92.Google Scholar

Gruner, (J.W.), 1944. The kaolinite structure of amesite… and additional notes on chlorites. Amer. Min., vol. 29, pp. 422-430. [M.A. 9-232.lGoogle Scholar

Hallimond, (A.F.), 1939. With HARVEY (C. 0.) and BANNISTER (F. A.). On the relation of chamosite and daphnite to the chlorite group. Min. Mag., vol. 25, pp. 441-465.Google Scholar

Hendricks, (S.B.), 1939. Random structures of layer minerals as illustrated by eronsted[t]ite… Amer. Min., vol. 24, pp. 529-539. [M.A. 7-496.]Google Scholar

Mcmvxchy, (R.C.), 1934. The crystal structure of the chlorite minerals. Zeits. Krist., vol. 88, pp. 420-432. [M.A. 6-45.]Google Scholar

Orcel, (J.), 1927. Reeherches sur la composition ehimique des chlorites. Bull. Soe. Franç. Min., vol. 50, pp. 75-454. [M.A. 3-372.]Google Scholar

Hénin, (S.), and Caillère, (S.), 1949. Sur les silicates phylliteux des minerals de fer oolithiques. C.R. Aead. Sei. Paris, vol. 229, pp. 134-135. [M.A. 11-210.]Google Scholar

Sudo, (T.), 1943. On some low temperature hydrous silicates found in Japan. Bull. Chem. Soc. Japan, vol. 18, pp. 281-329. [M.A. 10-147.]Google Scholar

Tschermak, (G.), 1891. Die Chloritgruppe. Sitz. Akad. Wiss. Wien. Math.-nat. KI., Abt. I, vol. 99, pp. 174-267. vol. 100, pp. 29-107.Google Scholar

Wilson, (A. J. C.), 1949. X-ray optics. London, pp. 71-74. [M.A. 10-504.] See also O. S. Edwards and H. Lipson, Proe. Roy. Soc. London, Ser. A, vol. 180, p. 268. [M.A. 8-362.]Google Scholar