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Truscottite

Published online by Cambridge University Press:  14 March 2018

A. L. Mackay  and
H. F. W. Taylor
A. L. Mackay
Affiliation:
Birkbeck College Research Laboratory, University of London
H. F. W. Taylor
Affiliation:
Department of Chemistry, University of Aberdeen
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Extract

The mineral truscottite was discovered at the Lebong Donok mine, Benkulen, Sumatra, by Hövig in 1914. He considered it to be a hydrated calcium silicate of composition CaO.2SiO2.1/2H2O. Later work by Grutterink suggested a different formula, 2(Ca,Mg)O.3SiO2.2H2O, the water content being reduced to 1-3 molecules after drying at 120°. Grutterink noted that the composition, general character, and optical properties indicated a similarity to gyrolite. Flint, McMurdie, and Wells concluded from X-ray powder photographs that the two species were identical, although they detected quartz as an impurity in the truscottite examined. All known specimens of truscottite come from the original locality, and no further investigations have been reported.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 30 , Issue 226 , September 1954 , pp. 450 - 457
Copyright
Copyright © 1954, The Mineralogical Society

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References

1 Hövig, P., Jaarboek van het Mijnwezen in Nederlandsch Oost-Indie, Batavia, 1914. vol. 41 (for 1912), p. 202 Google Scholar. [Min. Mag. 20-466.]

2 Grutterink, J.A., Verh. Geol.-Mijnb. Genootschap Nederland, Geol. Ser., 1925. vol. 8, p. 197 Google Scholar. [M.A. 3-271.]

3 Flint, E.P., McMurdie, H.F., and Wells, L.S., Journ. Res. Nat. Bur. Standards, U.S.A., 1938. vol. 21, p. 617 CrossRefGoogle Scholar. [M.A. 7-283.]

page 451 note 1 Mackay, A.L. and W, H.F.. Taylor, Gyrolite. Min. Mag., 1953. vol. 30, pp. 80 CrossRefGoogle Scholar. 91. (Correction, p. 80. for B.M. 1925,1044 read B.M. 93504.)