The Mössbauer spectrum of the new mineral fluorannite

Author： Qin Shan Li Zhe Wu Ziyu Lu Anhuai

Publisher： E. Schweizerbart'sche Verlagsbuchhandlung

ISSN： 0935-1221

Source： European Journal of Mineralogy, Vol.14, Iss.6, 2002-12, pp. : 1049-1052

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Abstract

The mineral fluorannite, a new member in trioctahedral micas, has been approved by the Commission on New Minerals and Mineral Names (CNMMN) in 1999. Here a room-temperature Mössbauer data of this new mineral from Suzhou, China was reported and interpreted in terms of quadrupole splitting distributions (QSDs). Based on QSD analysis, the overall of QSDs at 298 K can be interpreted in terms of four QSD contributions centered at QS = 2.571 mm/s for Fe²⁺-O₄(OH)₂ octahedra (cis and trans not resolved), QS = 2.255 mm/s for Fe²⁺-O₄(OH)F octahedra (cis and trans not resolved), QS = 2.166 mm/s for cis-Fe²⁺-O₄F₂ octahedra, and QS = 1.278 mm/s for trans-Fe²⁺-O₄F₂ octahedra. The ferric ironspectral component with CS = 0.378 mm/s and QS = 0.645mm/s was also characterized.