...) and Fourier transform infrared (FTIR) spectroscopy methods. The EMPA data show that three samples fall into the compositional field of fluoro-edenite ( Hawthorne et al. , 2012 ), whereas two samples are enriched in high-charged C cations and – although very close to the C R 3+ boundary – must be classified...

...Italo Campostrini; Francesco Demartin; Pietro Vignola; Federico Pezzotta ABSTRACT Ferro-fluoro-edenite, ideally NaCa 2 Fe 2+ 5 (Si 7 Al)O 22 F 2 , was found as prismatic crystals up to 1.00 mm inside cavities in ejecta of the 1873 eruption at La Fossa crater, Vulcano Island, Aeolian Archipelago...

...Antonio Gianfagna; Giovanni B. Andreozzi; Paolo Ballirano; Simona Mazziotti-Tagliani; Biagio M. Bruni Abstract Fluoro-edenite [NaCa 2 Mg 5 (Si 7 Al)O 22 F 2 ], a new end-member of the calcic amphibole group, is present with both prismatic and fibrous morphologies in the altered volcanic products...

...C. Rinaudo; S. Cairo; D. Gastaldi; A. Gianfagna; S. Mazziotti Tagliani; G. Tosi; C. Conti Abstract The prismatic variety of fluoro-edenite, a new amphibole found in lavas from Mt Etna in Biancavilla (Catania Province, Sicily, Italy), has been characterized by μ-Raman and μ-FTIR spectroscopy...

...Antonio Gianfagna; Roberta Oberti Abstract Fluoro-edenite, ideally NaCa 2 Mg 5 (Si 7 Al)O 22 F 2 , was found both as prismatic or acicular crystals of millimetric size and as fibers in the rock cavities in gray-red altered benmoreitic lavas occurring at Biancavilla (Etnean Volcanic Complex, Catania...

.... The amphibole is identified as fluoro-edenite, and textures indicate that it replaces clinopyroxene via a reaction in which diopside, olivine, and plagioclase form fluoro-edenite. Trace-element data are consistent with the formation of fluoro-edenite from clinopyroxene and plagioclase. Fluoro-edenite has a REE...