Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-04T18:44:43.081Z Has data issue: false hasContentIssue false
  • English
  • Français

The crystal structure of julgoldite

Published online by Cambridge University Press:  05 July 2018

Rudolf Allmann  and
Gabrielle Donnay
Rudolf Allmann
Affiliation:
Fachbereich Geowissenschaften, Philipps-Universität, 355 Marburg, Germany
Gabrielle Donnay
Affiliation:
Department of Geological Sciences, McGill University, Montreal 101 Quebec, Canada
Get access Rights & Permissions [Opens in a new window]

Summary

The structure of julgoldite, , has been determined and refined to an R value of 4·6 % based on 2417 symmetry-independent reflections, of which 765 are unobserved (weighted R = 4·3 %). The cell dimensions are a 8·922(4), b 6·081(3), c 19·432(9) Å, β 97·60(6)°, the space group is A2/m with Z = 4 and Dcalc 3·56 g cm-3. Julgoldite is isostructural with pumpellyite; the Si-O and Ca-O distances of julgoldite are identical, within experimental accuracy, with corresponding distances in pumpellyite; the Fe-O distances of julgoldite are about 0·09 Å longer than the corresponding (Al, Mg)-O distances in pumpellyite. The four hydroxyl groups and the extent of O-for-OH substitution are identified by valence-sum calculations.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 303 , September 1973 , pp. 271 - 281
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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

Allman, (R.) and Donnay, (Gabrjelle), 1971, Acta Cryst. B27, 1871-5.CrossRefGoogle Scholar
Coombs, (D. S.), 1961. Austral. Journ. Sci., 24, 203–15.Google Scholar
Cromer, (D. T.), 1965. Acta Cryst., 18, 17–23.Google Scholar
Donnay, (Gabrielle) and Allmann, (R.), 1970. Amer. Min., 55, 1003–15.Google Scholar
Galli, (E.) and Alberti, (A.), 1969. Acta Cryst. B25, 2276-81.CrossRefGoogle Scholar
Hanson, (H. P.), Herman, (F.), Lea, (J. D.), and Skilman, (S.), 1964. Ibid. 17, 1040-4.CrossRefGoogle Scholar
Hanson, (H. P.) and Pohler, (R. F.), 1966. Ibid. 21, 435.CrossRefGoogle Scholar
Moore, (P. B.), 1971. Lithos, 4, 93-9.CrossRefGoogle Scholar
Shannon, (R. D.) and Prewitt, (C. T.), 1969. Acta Cryst. B25, 925-46CrossRefGoogle Scholar