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... Roberta Oberti 1 ,* , Fernando Cámara 1 and José Maria Caballero 2 , {dagger} ... The accuracy of the SIMS analysis for H 2 O and Li 2 O was shown to be around 1015% rel, and 10% for F, B, Be, and Cl ion signals, tested at 11, 9, and... more
... Roberta Oberti 1 ,* , Fernando Cámara 1 and José Maria Caballero 2 , {dagger} ... The accuracy of the SIMS analysis for H 2 O and Li 2 O was shown to be around 1015% rel, and 10% for F, B, Be, and Cl ion signals, tested at 11, 9, and 37 mass numbers (amu), were negligible. ...
Research Interests: Geology, Geochemistry, Chemistry, Crystallography, Lithium, and 6 moreQuantification, Li, Nomenclature, Guadarrama, Amphibole, and Sierra
Lusernaite-(Y), IMA 2011-108, CNMNC Newsletter No. 13, June 2012, page 811.
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Cámaraite, ideally Ba3NaTi4(Fe2+,Mn)8(Si2O7)4O4(OH,F)7, is a new mineral from the Verkhnee Espe deposit, Akjailyautas Mountains, Kazakhstan. It occurs as intergrowths with bafertisite and jinshajiangite in separate platy crystals up to 8... more
Cámaraite, ideally Ba3NaTi4(Fe2+,Mn)8(Si2O7)4O4(OH,F)7, is a new mineral from the Verkhnee Espe deposit, Akjailyautas Mountains, Kazakhstan. It occurs as intergrowths with bafertisite and jinshajiangite in separate platy crystals up to 8 mm × 15 mm × 2 mm in size, or as star-shaped aggregates of crystals with different orientations. Individual crystals are orange-red to brownish-red, and are platy on {001}. Cámaraite is translucent and has a pale-yellow streak, a vitreous lustre, and does not fluoresce under cathode or ultraviolet light. Cleavage is {001} perfect, no parting was observed, and Mohs hardness is <5; the mineral is brittle. The calculated density is 4.018 g cm-3. In transmitted light, camaraite is strongly pleochroic, X = light brown, Y = reddish-brown, Z = yellow- brown, with Z < X < Y. Cámaraite is biaxial +ve and 2Vmeas. = 93(1)°. All refractive indices are greater than 1.80. Cámaraite is triclinic, space group C , a = 10.678(4) Å, b = 13.744(8) Å, c = 21.40...
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Abstract.This paper reports the crystalchemical study of cordierite from a volcanic ejectum from the Tolfa volcanic center (Latium, Italy). The studied rock was sampled within the pyroclastic deposit (tufo caotico) outcropping in a... more
Abstract.This paper reports the crystalchemical study of cordierite from a volcanic ejectum from the Tolfa volcanic center (Latium, Italy). The studied rock was sampled within the pyroclastic deposit (tufo caotico) outcropping in a quarry at Colle dello Spizzicatore, ...