Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-27T23:24:33.045Z Has data issue: false hasContentIssue false
  • English
  • Français

A natural ferrous substituted saléeite from Arcu su Linnarbu, Capoterra, Cagliari, Sardinia

Published online by Cambridge University Press:  05 July 2018

R. Vochten  and
K. Van Springel
R. Vochten
Affiliation:
Laboratorium voor chemische en fysische mineralogie, Departement Scheikunde, Universiteit Antwerpen, Middelheimlaan 1, 2020 Antwerpen, Belgium
K. Van Springel
Affiliation:
Laboratorium voor chemische en fysische mineralogie, Departement Scheikunde, Universiteit Antwerpen, Middelheimlaan 1, 2020 Antwerpen, Belgium
Get access Rights & Permissions [Opens in a new window]

Abstract

Ferrous substituted saléeite is a new variety of saléeite from Arcu su Linnarbu, Sardinia. It is tetragonal with a = 6.982(2) c = 19.660(2) Å, Z = 2; the ideal formula is (Mg,Fe2+)(UO2)2(PO4)2·4H2O. The strongest lines in the X-ray powder diffraction pattern are: 3.473(100)(114), 4.95(50)(110), 4.91(40)(004), 4.443(40)(112), 2.200(30)(118), 2.193(30)(303) and 2.178(30)(009). The mineral is light-yellow in colour and is dull fluorescent. The measured density is 3.242 g/cm3 and Z = 2. There is a prominent (001) cleavage. Refractive indices are : α = 1.572(2) β = 1.577(2) γ = 1.581(2) and 2V = 48°(2). The pleochroism is very weak and the elongation is positive parallel to Y. The mineral occurs as subparallel crystal aggregates with a quadratic outline.

Keywords

saléeiteferrous substitutionuranyl phosphate groupArcu Su LinnarbuSardinia
Type
Mineralogy
Information
Mineralogical Magazine , Volume 60 , Issue 401 , August 1996 , pp. 647 - 651
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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

Feigl, F. (1972) Spot tests in inorganic analysis. Elsevier Publishing Company, New York, p. 265.Google Scholar
Frondel, C. (1958) Systematic Mineralogy of Uranium and Thorium. Geol. Survey Bull., 1064, 181—2, 201—4.Google Scholar
Gabe, E.J., Le Page, Y., Charland, J.P., Lee” F.L. and White, P.S. (1989) NRCVAX - An interaction program system for structure analysis. J. Appl. Crystallogr., 22, 384—7.CrossRefGoogle Scholar
Garavelli, C.L., Mazzi, F. and Rinaldi, F. (1959) Minerali secondari du Uranio nella zona di San Leone (Cagliari). C.N.R.N., St.Ric.Div. Geomin, Roma, 11, 275—98.Google Scholar
Gonzalez-Diaz, P.F. and Santas, M. (1978) Infrared spectra of strontium, lead and barium apatites. Spectrochim. Acta, 33A, 241—6.Google Scholar
Hoffmann, G., (1972) Unpublished thesis, University of Munich.Google Scholar
Ippolito, F., Baggio, P., Lorenzoni, S., Mittempergher, M. and Silvestro, F. (1956) Studi sulla mineralizza- zione di Uranio in Italia. Vlndustria Minerania, RomaVn, Nr.9, 627-34.Google Scholar
Lencastre, J. (1964—5) Contribui?ao paro o estudo dos minerals secuddrios de uranio portugueses. Comunicagdes dos servigos geoldgocos de Portugal, 49, Lisboa.Google Scholar
Mandarino, J.A., (1981) The Gladstone-Dale relationship :Part IV. The compatibility concept and its application. Can, Mineral., 19, 441—50.Google Scholar
Pietracaprina, A. (1963) I minerali d'Uranio in Sardegna. Studi Sassaresi, Sassari, Sez.Ill, XI, fasc. 3, 587–650.Google Scholar
Ravagnani, D. (1974) I giacimenti uraniferi italiani e i loro minerali. Gruppo Mineralogico Lombardo, Milano.Google Scholar
Vochten, R., De Grave, E. and Pelsmaeckers, J. (1984) Mineralogical study of bassetite in relation to its oxidation. Amer. Mineral, 69, 967—78.Google Scholar