...}\mathit{T}^{{-}3}\end{eqnarray*} \end{document} \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \begin{eqnarray*}&&Fluorotremolite\ {-}\ Ca_{2}Mg_{5}Si_{8}O_{22}F_{2}\\&&\mathit{C...

...Jean-Louis Robert; Giancarlo Della Ventura; Frank C. Hawthorne Amphiboles were synthesized along the joins tremolite-fluorotremolite, richterite-fluororichterite and potassic-richterite-potassic-fluororichterite at 750 degrees C and 1 kbar P(H 2 O). Infrared spectra of the amphiboles were recorded...

...Frank C. Hawthorne; Roberta Oberti; Robert F. Martin Abstract The crystal structures of four amphiboles from the Bear Lake diggings, in the Bancroft area of Ontario, fluorotremolite, fluororichterite and two samples of potassian fluor-magnesiokatophorite, have been refined to R indices in the range...

...F ig . 14. Infrared spectra in the principal (OH)-stretching region for (a) amphiboles of the tremolite–fluorotremolite solid-solution, and (b) amphiboles of the richterite–fluororichterite solid-solution. From Robert et al. (1999) . ...

... for synthetic gallian fluorotremolite-pargasite amphiboles (Ca 2 Mg 5 Si 8 O 22 F 2 -NaCa 2 Mg 4 Ga 3 Si 6 O 22 F 2 ) whose crystal-chemical characterization was reported earlier by Jenkins and Hawthorne (1995) . Furthermore, evolution of the IR spectra for untreated (natural) amphiboles and their deuterated...

.... , ‘fluorotremolite’ which is not a name approved by the IMA. Tremolite ss corresponds to the amphibole from the white-grey marble. It contains between 1.2 and 1.4 wt.% F, i.e. , 0.53–0.61 apfu ( Fig. 8 ; Table 5 ). This tremolite also has Al up to 2.1 wt.% Al 2 O 3 , Na between 0.2 and 0.4 wt.% Na 2 O, and K...

...Figure 21. Infrared spectra in the principal (OH)-stretching region for (a) an amphibole of intermediate composition in the tremolite-fluorotremolite solid-solution; (b) an amphibole of intermediate composition in the richterite-fluororichterite solid-solution (from Robert et al. 1999 ). ...

..., these authors observed a significant shortening of the < M (l)–O> and < M (3)–O> distances. Despite the frequent use of the term ‘fluoro-tremolite’ (and its spelling variants: ‘fluorotremolite and ‘fluortremolite’) in the mineralogical literature (e.g. Valley et al ., 1982 ; Petersen et al...

...-tremolite, ideally A ☐ B Ca 2 C Mg 5 T Si 8 O 22 W F 2 , monoclinic, is the fluorine-analog of tremolite, the composition at the root of amphibole compositional space in all classification schemes used to date. Despite the frequent use of the term “fluorotremolite” (“fluorotremolite”, “fluortremolite...

...]-coordinated: O(3) = (F,Cl,O), A = (Na,K,Ca); [3]-coordinated: O(3) = (OH), A = □; [4]-coordinated: O(3) = (OH), A = (Na,K,Ca). The lower the coordination number of O(7), the shorter is the T (1)-O(7) bond and the larger is its corresponding bond-valence (compare fluorotremolite, tremolite...

... . Infrared spectroscopy of amphiboles in the tremolite–fluorotremolite series show a single OH-stretching band at 3674 cm –1 (Jenkins, 1987 ; Gottschalk et al ., 1999 ; Robert et al ., 1999 ), and the position of this band does not change with varying F content (apfu). This ‘one-mode behaviour’ (Chang...

..., fluoropargasite, tremolite and fluorotremolite . European Journal of Mineral-ogy , 22 , 319 – 331 . Davies , G.F. ( 1974 ) Effective elastic moduli under hydrostatic stress—I. quasi-harmonic theory . Journal of Physics and Chemistry of Solids , 35 , 1513 – 1520 . Fischer , K.M. , Ford...

... (1995) studied the join fluorotremolite–Ga-fluoropargasite [ A □ B Ca 2 C Mg 5 T Si 8 O 22 W F 2 – A Na B Ca 2 C (Mg 4 Ga) T (Si 6 Ga 2 ) O 22 W F 2 ], where the composition of the amphibole can be expressed via the “Ga-pargasite” exchange A □ −1 C Mg −1 T Si −2 A Na 1 C Ga 1 T Ga 2...

.... Benisek A. Tippelt G. Maresch W. ( 2010b ) Heat capacity and third-law entropy of kaersutite, pargasite, fluoropargasite, tremolite and fluorotremolite . European Journal of Mineralogy , 22 , 319 – 331 . Dachs E. Geiger C.A. Benisek A. Grevel K-D. ( 2012 ) Grossular...