Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-19T06:28:53.827Z Has data issue: false hasContentIssue false
  • English
  • Français

X-ray data, optical anisotropism, and thermal stability of cobaltite, gersdorffite, and ullmannite

Published online by Cambridge University Press:  05 July 2018

P. Bayliss
P. Bayliss*
Affiliation:
School of Applied Geology, University of New South Wales
Get access Rights & Permissions [Opens in a new window]

Summary

Data are presented from cobaltite (CoAsS), gersdorffite (NiAsS), and ullmannite (NiSbS) for cell size, compositional zoning, mineralogical association, X-ray diffraction powder intensities, and optical anisotropy. The presence of powder X-ray diffraction reflections 001 and 011 are related to the crystal structure type. The amount of distortion from cubic symmetry is related to the 001 reflection intensity and also to the optical anisotropism strength. These properties are related approximately to the thermal stability of the distorted crystal structure. This thermal stability increases with the substitution of cobalt for nickel, which decreases the cell size. An order-disorder change occurs before the distortion release in non-cubic gersdorffite (P1) with a large cell size, whereas only a distortion release is observed in cobaltite (Pca21) and non-cubic gersdorffite (P1) with a small cell size. Glaucodot (Co,Fe)AsS converted to cobaltite at 620 C. No evidence was found to relate optical anisotropism of pyrite to deviations from cubic symmetry.

Type
Research Article
Information
Mineralogical Magazine , Volume 37 , Issue 285 , March 1969 , pp. 26 - 33
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

1

Present address : Department of Geology, University of Calgary, Alberta.

References

Bashenov, (A. I.) , 1958. , no. 4, 169]; abstract in Zentr. Min., 1961, Teil I, 95.Google Scholar
Bayliss, (P.), 1968. Amer. Min. 53, 290.Google Scholar
Bayliss, (P.) and Stephenson, (N. C.), 1967. Min. Mag. 36, 38.Google Scholar
Bayliss, (P.) and Stephenson, (N. C.), 1968. Ibid. 36, 940.10.1180/minmag.1968.283.036.04CrossRefGoogle Scholar
Bernard, (J. H.), 1958. [Sbornik Útr. iist. geol. 21, 805]; abtracts in Zentr. Min., 1958 , Teil 1, 100.Google Scholar
Berry, (L. G.) and Thompson, (R. M.), 1962. X-ray powder data for ore minerals. Geol. Soc. Amer. Mem. 85.Google Scholar
Bokii, (G. B.) and Tsinokev, (L. I.), 1954, , 9, 239]; abstract in Chem. Abstr. 48, 13553 H.Google Scholar
Ferguson, (R. B.), 1947. Univ. Toronto Studies, Geol. Ser. no. 51, 41.Google Scholar
Flörke, (W.), 1926. Centr. Min. 337.Google Scholar
Gibbons, (G. S.), 1967. Amer. Min. 52, 359.Google Scholar
Giese, (R. F.) Jr. and Kerr, (P. F.), 1965. Ibid. 50, 1002.Google Scholar
Goll, (J. J.), 1937. Bull. internat. Acad. Sci. Bohême, 38, II [M.A. 9-206].Google Scholar
Harcourt, (G. A.), 1942. Amer. Min. 27, 63.Google Scholar
Jong, (W. F. de), 1926. Physica, Nederl. tijds, natuurk. 6, 325.Google Scholar
Klemm, (D. D.), 1962. Neues Jahrb. Min., Abh. 97, 337.Google Scholar
Klemm, (D. D.), 1965. Ibid. 103, 205.10.1038/205103a0CrossRefGoogle Scholar
Mechling, (M.), 1921. Abh. Math.-Phys. Kl. Sächs. Akad. Wiss. Leipzig, 33, 37.Google Scholar
Morimoto, (N.) and Clark, (L. A.), 1961. Amer. Min. 46, 1448.Google Scholar
Nelson, (J. B.), and Riley, (D. P.), 1945. Proc. Phys. Soc. 57, 160.10.1088/0959-5309/57/3/302CrossRefGoogle Scholar
Oftedal, (I.), 1963. Norsk geol. tidsskr. 43, 401.Google Scholar
Olshausen, (S. K. V.), 1925. Zeits. Krist. 61, 463.Google Scholar
Onorato, (E.), 1957. Neues Jahrb. Min., Abh. 91, 41.Google Scholar
Peacock, (M. A.) and Berry, (L. G.), 1940. Univ. Toronto Studies, Geol. Ser. no. 44, 47.Google Scholar
Peacock, (M. A.) and Henry, (W. G.), 1948. ibid. no. 52, 47.Google Scholar
Ramdohr, (P.), 1960. Die Erzmineralien und ihre Verwachsungen, Akademie-Verlag, Berlin.Google Scholar
Ramsdell, (L. S.), 1925. Amer. Min. 10, 281.Google Scholar
Roseboom, (E. H.), 1962. Ibid. 47, 310.Google Scholar
Schneiderholm, (H.) 1922. [Anleitung zur mikrokopischea Bestimmu:Tg und Untersuchung der Erzen und Aufbereitungsprodukten besonders im auffhllende;7 Licht. Berlin,]; review in Econ. Geol., 1923, 18, 604.Google Scholar
Shishkin, (N. N.) , 1958. (Compt. Rend. Acad. Sci. URSS), 121, 724]; abstract in Min. Abstr. 14, 140.Google Scholar
Silberman, (Ya. R.), Balter, (B. L.), and Erenburg, (B. G.) , 1958. ; abstract in Zentr. Min., 1961, Tell 1, 95.Google Scholar
Takeuchi, (Y.), 1957. Min. Journ. Japan, 2, 90.Google Scholar
Yund, (R. A.), 1962. Amer. Journ. Sci. 260, 761.10.2475/ajs.260.10.761CrossRefGoogle Scholar
Zachariasen, (W.), 1927. Quoted in Strukturbericht, 1913-1928, 284, from [Goldscbmidt, Geochemische Verteilungsgesetze, 8].Google Scholar