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The Mössbauer spectrum of the new mineral fluorannite

¹ Department of Geology, Peking University, Beijing 100871, China
² Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
³ Beijing Synchrotron Radiation Facility, Chinese Academy of Sciences, Beijing 100039, China

e-mail: sqin{at}geoms.geo.pku.edu.cn

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 iron spectral component with CS = 0.378 mm/s and QS = 0.645 mm/s was also characterized.

Key-words: fluorannite, new mineral, Mössbauer spectroscopy, quadrupole splitting distributions..

This article has been cited by other articles:

				M. F. Brigatti, E. Caprilli, D. Malferrari, and A. Mottana Crystal structure and crystal chemistry of fluorannite and its relationships to annite Mineralogical Magazine, December 1, 2007; 71(6): 683 - 690. [Abstract] [Full Text] [PDF]