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Tazzoli, V. (1983) The crystal structure of cesanite, Ca1+xNa4−x(SO4)3(OH)x · (1−x)H2O, a sulphate isotypic to apatite. Mineralogical Magazine, 47 (342). 59-63 doi:10.1180/minmag.1983.047.342.10

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Reference TypeJournal (article/letter/editorial)
TitleThe crystal structure of cesanite, Ca1+xNa4−x(SO4)3(OH)x · (1−x)H2O, a sulphate isotypic to apatite
JournalMineralogical MagazineISSN0026-461X
AuthorsTazzoli, V.Author
Year1983 (March)Volume47
Page(s)59-63Issue342
PublisherMineralogical Society
Download URLhttps://rruff.info/doclib/MinMag/Volume_47/47-342-59.pdf+
DOIdoi:10.1180/minmag.1983.047.342.10Search in ResearchGate
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Full ReferenceTazzoli, V. (1983) The crystal structure of cesanite, Ca1+xNa4−x(SO4)3(OH)x · (1−x)H2O, a sulphate isotypic to apatite. Mineralogical Magazine, 47 (342). 59-63 doi:10.1180/minmag.1983.047.342.10
Plain TextTazzoli, V. (1983) The crystal structure of cesanite, Ca1+xNa4−x(SO4)3(OH)x · (1−x)H2O, a sulphate isotypic to apatite. Mineralogical Magazine, 47 (342). 59-63 doi:10.1180/minmag.1983.047.342.10
In(1983, March) Mineralogical Magazine Vol. 47 (342) Mineralogical Society
Abstract/NotesAbstractCesanite, Ca1+xNa4−x(SO4)3(OH)x · (1 − x) H2O, is hexagonal, space group P63/m, a = 9.446(1) and c = 6.895(1) Å, Z = 2. The crystal structure refinement, carried out by utilizing 457 independent reflections (final R = 0.021), shows that cesanite is isotypic to hydroxyapatite. The P atom of apatite is completely replaced in cesanite by an S atom; the two independent Ca sites of apatite are occupied respectively by Na and Na + Ca, the charge balance being by partial substitution of H2O for OH− although the occupancy of the (H2O,OH−) sites is not complete. The relationship between the water vacancies and the structural features of the (Ca,Na) polyhedron is discussed. A new general formula for the apatite-wilkeite-ellestadite series is proposed.

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