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Cesanite, Ca2Na3[(OH)(SO4)3] , a sulphate isotypic to apatite, from the Cesano geothermal field (Latium, Italy)

Published online by Cambridge University Press:  05 July 2018

G. Cavarretta ,
A. Mottana  and
F. Tecce
G. Cavarretta
Affiliation:
Centro Di Studio per la Geologia dell'Italia Centrale del C.N.R., c/o Istituto di Geologia e Paleontologia, Città Universitaria, 00185 Roma, Italy
A. Mottana
Affiliation:
Cattedra di Mineralogia, Istituto di Mineralogia e Petrografia, Città Universitaria, 00185 Roma, Italy
F. Tecce
Affiliation:
Progetto Finalizzato ‘Energetica’ del C.N.R., c/o Istituto di Geologia e Paleontologia, Città Universitaria, 00185 Roma, Italy
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Abstract

Cesanite occurs both as a solid vein (1 cm thick) and as a cavity-filling of an explosive breccia in core samples of the Cesano 1 geothermal well (Cesano area, Latium, Italy).

Cesanite is coloudess, medium to coarse grained, soft (H = 2 to 3) and light (ρmeas 2.786±0.002 g cm−3). It is uniaxial negative, ε = 1.564, ω = 1.570, with space group P63/m and cell parameters a = 9.442 (4), c = 6.903 (3) Å, for c/a = 0.730. Identifying spacings are 8.161, 2.822, 2.727,1.844 Å, in X-ray powder patterns strikingly similar to those of apatite. The chemical formula (microprobe analyses on two grains) is Ca1.53Sr0.03Na3.42K0.02[(Cl0.06F0.06OH0.44)(S2.99O12)]·0.44H2O, while the theoretical formula, derived from considerations on structural identity with apatite, is Ca2Na3[(OH)(SO4)3]. Cesanite is the end member of the apatite-wilkeite ellestadite series where [PO4]3− is entirely substituted by [SO4]2−, the charge balance being made up by Na+ substituting for Ca2+.

Type
Research Article
Information
Mineralogical Magazine , Volume 44 , Issue 335 , September 1981 , pp. 269 - 273
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1981

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References

Appleman, D. F. and Evans, H. T. (1972). Nat. Techn. Inf. Serv. U.S. Dep. Commerce, Springfield, Virginia, PB-216, 188.Google Scholar
Baldi, P., Civitelli, G., Funiciello, R., Lombardi, G., Parotto, M., and Serva, L. (1976a). Intern. Conor. on Thermal Waters, Geothermal Eneroy and Volcanism of the Mediterranean Area, Athens, Proc. Geoth. Energy, 1, 71-86.Google Scholar
Baldi, P., Funiciello, R., Locardi, E., and Parotto, M. (1976b). Ibid. 1, 43-55.Google Scholar
Calamai, A., Cataldi, R., Dall'Aglio, M., and Ferrara, G. C. (1975). UN Syrup. on Geothermal Energy, S. Francisco, Cal., USA 1, 305-13.Google Scholar
Chapell, B. W. and White, A. J. R. (1968). Am. Mineral. 53, 1735-8.Google Scholar
Dihn, P. and Klement, R. (1942). Z. Elektrochem. 48, 331-3.Google Scholar
Eakle, A. S. and Rogers, A. F. (1914). Am. J. Sci. 37, 262-7.CrossRefGoogle Scholar
Fletcher, L. (1889). Mineral. Mag. 8, 172.CrossRefGoogle Scholar
Funieiello, R., Locardi, E., and Parotto, M. (1976). Boll. Soc. Geol. It. 95, 831-49.Google Scholar
Funieiello, R., Mariotti, G., Parotto, M., Preite-Martinez, M., Tecce, F., Toneatti, R., and Turi, B. (1979). Geothermics, 8, 55-73.CrossRefGoogle Scholar
Harada, K., Nagashima, N., Nakao, K., and Kato, A. (1971). Am. Mineral. 56, 1507-18.Google Scholar
Klement, R. (1939). Die Naturwiss, 27, 568.CrossRefGoogle Scholar
Lovering, J. F. and Widdowson, J. R. (1968). Lithos, 1, 264-7.CrossRefGoogle Scholar
McConnell, D. (1937). Am. Mineral. 22, 977-86.Google Scholar
Maras, A. (1979). Per. Mineral. 48, 195–203.Google Scholar
Neumann, E. R. (1976). Norsk Geol. Tidsskr. 56, 1-6.Google Scholar
Ramdohr, P. and Strunz, H. (1978). Klockmanns Lehrbuch der Mineralogie 16th edn., F. Enke Verlag, Stuttgart.Google Scholar
Schneider, W. (1967). Neues Jahrb. Mineral., Monatsh. 284-9.Google Scholar
Schneider, W. (1969). Ibid. 58-64.Google Scholar
Stern, W. B. (1979). Schweiz. Mineral. Petrogr. Mitt. 59, 75-82.Google Scholar
Vasilieva, Z. V., Litzarev, M. A., and Organova, N. I. (1958). Dokl. Akad. Nauk SSR, 118, 577-80. (In Russian.)Google Scholar
Websky, M. (1886). Sitzo-Ber. Berlin. Akad. Wiss. 1045.Google Scholar