Original paper

Rosiaite, PbSb2O6, a new mineral from the Cetine mine, Siena, Italy

Basso, Riccardo; Lucchetti, Gabriella; Zefiro, Liviο; Palenzona, Andrea

European Journal of Mineralogy Volume 8 Number 3 (1996), p. 487 - 492

23 references

published: Jun 17, 1996
manuscript accepted: Jan 31, 1996
manuscript received: Nov 14, 1995

DOI: 10.1127/ejm/8/3/0487

BibTeX file

ArtNo. ESP147050803003, Price: 29.00 €

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Abstract Rosiaite occurs at the Cetine di Cotorniano mine, formerly named Rosia mine, associated with valentinite, tripuhyite, bindheimite and a phase corresponding to the synthetic ß-Sb2O4 polymorph of cervantite. Rosiaite, appearing generally as aggregates of minute tabular {0001} crystals with hexagonal outline, is colourless to pale yellow, transparent, optically uniaxial negative and nonpleochroic with ω = 2.092(2) and 8 = 1.920(10). Microprobe analyses reveal a good compositional homogeneity and a quasi-ideal composition. The strongest lines in the powder pattern are d101 = 3.49 Å and d110 = 2.648 Å. The crystal structure, described in the space group P3 1m with a = 5.295(1) Å, c = 5.372(1) Å and Z = 1, has been refined to R = 0.033, confirming the new mineral to be the natural analogue of synthetic PbSb2O6 studied previously. The approximately hexagonal close-packed structure of rosiaite shows a pattern of occupied octahedral sites identical to that of synthetic compounds such as Li2ZrF6, Li2NbOF5 and several double hexaoxides, containing Sb or As.


rosiaitenew mineralphysical and chemical datapowder patternstructure refinement