Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-25T19:16:20.513Z Has data issue: false hasContentIssue false
  • English
  • Français

The högbomite polytypes

Published online by Cambridge University Press:  14 March 2018

Duncan McKie
Duncan McKie*
Affiliation:
Department of Mineralogy and Petrology, Downing Place, Cambridge
Get access Rights & Permissions [Opens in a new window]

Summary

Single crystal X-ray examination has shown that högbomite forms a series of polytypes, designated nH or nR, with hexagonal or rhombohedral lattices and hexagonal unit-cell dimensions a 5·72 Å, c 4·6 × n Å. The polytypes arise by variation, in a manner as yet undetermined, of the stacking sequence of approximately close-packed oxygen layers with interstitial cations on fourfold and on sixfold sites; the composition of 1/nth of a unit-cell may be represented as R2+1.0_1.6T4+0.2-0.4R3+3.7-4.3O2-7.6-8.0(OH)-0-0.4,, where R2+ = Zn, Fe, Mg, and R2+ = Fe, Al. The polytypes so far observed are 4H, 5H, 6H, 15H, 15R, and 18R. Minerals structurally related to högbomite are nigerite (3H) and taaffeite (4H). A new occurrence of högbomite, polytype 5H, with composition Ti1·7Fe1·6Mg6·3Al18·8Si0·2O40, is described from a spinel-free paragenesis in a magnesian skarn at Mautia Hill, Tanganyika. Another new occurrence in an aluminous xenolith in the Cashel gabbro in Co. Galway, Ireland, is recorded. X-ray powder data are given for two of the polytypes.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 33 , Issue 262 , September 1963 , pp. 563 - 580
Copyright
Copyright © 1963, The Mineralogical Society

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.)

References

Adensköld, (V.), 1938.Arkiv Kenfi, Min. Geol., vol. 12/3, no. 29.Google Scholar
Agrell, (S.O.) and Laualey, (J.M.), 1958.Proc. Ray. Irish Acad., vol. 59/3, p. 93.Google Scholar
Ahrens, (L. I-I.), 1952.Geochimica Acta, vol. 2, p. 155.Google Scholar
Anderson, (B.W.), Payzie, (C.J.), and Claringbull, (G.F.), 1951.Min. Mag., vol. 29, p. 765.Google Scholar
Banister, (F.A.), Hey (M. I-t.), and Stadler, (H.P.), 1947.Min. Mag., vol. 28, p. 129.Google Scholar
Beevers, (C.A.) and Ross (M. A. S.), 1937.Zeits. Krist., vol. 97, p. 59.Google Scholar
[Berezhnoi, (A.S.) and Gulko, (N. V.)] 1955. [Ukraine Chem. Journ.], vol. 21, p. 162.Google Scholar
Berry, (L.G.), 1951.Amer. Min., vol. 36, p. 512.Google Scholar
[Bobrovnik, (D.P.)] (Probl. Mineralogy Sedim. :Formations), Lvov Univ., vol. 2, p. 215.Google Scholar
Christopite-Lvhchel-Lévy, (M.) and Sandrea, (A.), 1953.Bull. Soc. franç. Min., Crist., vol. 76, p. 430.Google Scholar
Cubin, (H.), Guillemin, (C.), Orcel, (J.), and St Ernbreg, (M.), 1956.Compt. Rend. Acad. Sci. Paris, vol. 242, p. 2845.Google Scholar
Donnay, (J. D. H.), and Nowacki, (W.), 1954. Mere. Geol. Soc. Amer., no. 60.Google Scholar
Friedman, (G.M.), 1952.Amer. Min., vol. 37, p. 600.Google Scholar
Gavelin, (A.), 1917.Bull. Geol. Inst. Upsala, vol. 15, p. 289.Google Scholar
Gillson, (J.L.), and Kania (J. E. A.), 1930.Econ. Geol., vol. 25, p. 506.CrossRefGoogle Scholar
Kolderup, (N. H.), 1928. Bergens Musemns Ärbok, no. 1. 1936. Ibid., no. 8.Google Scholar
[Kuzmin, (A.M.)] (Geol. Geopbys., Acad. Sci. USSIR), no. 4, p. 63.Google Scholar
De Lapparent, (J.), 1946.Compt. Rend. Acad. Sci. Paris, vol. 223, p. 227. Mckie, (D.), 1959. Min. Mag., vo]. 32, p. 282.Google Scholar
[Mikheev, (V.I.)] Michejew, (W.J.), 1957. X-ray identification of minerals. Moscow.Google Scholar
[Moleva, (V.A.) and Myasnikov, (V.S.)] 1952. Cccp (Compt. Rend. Aead. Sei. URSS), vol. 83, p. 733.[M.A. 12-13].Google Scholar
Nel, (H.J.), 1949. Morn. Geol. Sure. South Africa, no. 43, p. 1.Google Scholar
Ӧnay, (T.S.), 1949.Schweiz. Min. Pert. Mitt., vol. 29, p. 357.Google Scholar
Ramsdell, (L.S.), 1947.Amer. Min., vol. 32, p. 64.Google Scholar
Ray, (D.M.), and Ray, (R.), 1955.Ibid., vol. 40, p. 147.Google Scholar
Sandrea, (A.), 1950.Compt. Rend. Acad. Sci. Paris, vol. 230, p. 2306.Google Scholar
Schetelig, (J.), 1917.Norsk Geol. Tidsskr., vol. 4, p. 249.Google Scholar
Smith, (F.G.), 1955.Amer. Min., vol. 40, p. 658.Google Scholar
Thibault, (N.W.), 1944.Ibid., vol. 29, p. 327.Google Scholar
Tilley, (C.I.), 1924.Quart. Joern. Geol. Soe., vol. 80, p. 22.CrossRefGoogle Scholar
Watson, (T.L.), 1923.Econ. Geol., vol. 18, p. 53.Google Scholar
Watson, (T.L.), 1925.Amer. Min., vol. 10, p. 1.Google Scholar
Yoder, (H.S.), 1952. Amer. Journ. Sci., Bowen vol. 1, p. 569.Google Scholar

A correction has been issued for this article:

Errata