Hostname: page-component-77c89778f8-vpsfw Total loading time: 0 Render date: 2024-07-18T22:42:44.490Z Has data issue: false hasContentIssue false
  • English
  • Français

The beryls of the Rosses district, Donegal

Published online by Cambridge University Press:  05 July 2018

A. Hall  and
J. N. Walsh
A. Hall
Affiliation:
Department of Geology, King's College, Strand, London, WC2R 2LS
J. N. Walsh
Affiliation:
Department of Geology, King's College, Strand, London, WC2R 2LS
Get access Rights & Permissions [Opens in a new window]

Summary

Chemical analyses and physical properties are given for six samples of beryl from greisenized granites, pegmatites, and beryl-quartz veins in the Rosses granite complex. The beryls studied were all very similar in composition and contain significant amounts of alkali elements and water in addition to the constituents represented by the formula Be3Al2Si6O18. Calculation of the empirical unit cell contents indicates that most of the H2O+ is present in the mineral as water molecules. The effects of these extra constituents on the physical properties are discussed, and it is suggested that the variation in refractive indices displayed by beryl is to a large extent attributable to the variable water content.

Type
Research Article
Information
Mineralogical Magazine , Volume 38 , Issue 295 , September 1971 , pp. 328 - 334
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1971

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

[Bakakin, (V.V.), Rylov, (G.M.), and BELOV (N. V.)] (H. B.) 1967. Dokl. Acad. Sci. U.S.S.R., Earth Sci. Sect. (English translation). 173, 129-32.Google Scholar
Burke, (K.C.), Cunningham, (M.A.), Gallagher, (M.J.), and Hawkes, (J.R.), 1964. Econ. Geol. 59, 1539-50.CrossRefGoogle Scholar
Deer, (W.A.), Howie, (R.A.), and Zussman, (J.), 1962. Rock-forming minerals, 1, Ortho- and Ring Silicates. London (Longmans).Google Scholar
Flanigen, (E.M.), Breck, (D.W.), Mumbach, (N.R.), and Taylor, (A.M.), 1967. Amer. Min. 52, 744-72.Google Scholar
[Gavrusevich, (B. A.) and Sarapulov, (F. Ya.)] 1941. [Compt. Rend. (Doklady) Acad. Sci. U.R.S.S. 31, 775], abstr. M.A. 9-135.Google Scholar
[Ginzburg, (A. I.)] CCCP (Trans. Min. Mus. Acad. Sci. U.S.S.R.), 7, 56], abstr. M.A. 13-183.Google Scholar
Harvey, (J. J. T.), 1969. Postmagmatic alteration in the Rosses granite complex, Donegal. Ph.D. thesis, University of London.Google Scholar
HAUGI-ITON, (S.), 1862. Quart. Journ. Geol Soc. 18, 403-20.CrossRefGoogle Scholar
Hey, (M.H.), 1939. Min. Mag. 25, 402-12.Google Scholar
Iiyama, (T.), 1958. Compt. Rend. Acad. Sci. Paris. 216, 795-8.Google Scholar
Paré, (X.) and Ducros, (P.), 1964. Bull. Soc. franc. Min. Crist. 87, 429-33 .Google Scholar
Pitcher, (W.S.), 1953. Proc. Geol. Assoc., Lond. 64, 153-82.CrossRefGoogle Scholar
Schaller, (W.T.), Stevens, (R.E.), and Jahns, (R.H.), 1962. Amer. Min. 47, 672-99.Google Scholar
Schrever, (W.) and Yoder, (H.S.), 1964. Neues Jahrb. Min., Abh. 101,271–342.Google Scholar
[Sosedko, (T. A.)] (Mem. All-Union Min. Soc.). 86, 495-99.Google Scholar
Sugitani, (Y.), Nagashima, (K.), and Fujiwara, (S.), 1966. Bull. Chem. Soc. Japan, 39, 672.CrossRefGoogle Scholar
Vorma, (A.), Sahama, (Th. G), and Haapala, (I.), 1965. Bull. Comm. Gdol. Finlarde. 218, 119-29.Google Scholar
Winchell, (A.N.), 1929. Amer. Min. 14, 125-49.Google Scholar
Winchell, (A.N.), 1951. Elements of optical mineralogy. Part II. Descriptions of minerals. 4th edn., New York (John Wiley and Sons).CrossRefGoogle Scholar
Wood, (D.L.) and Nassau, (K.), 1968. Amer. Min. 53, 777–800.Google Scholar