www.webmineral.com/data/Ferriwhittakerite.shtmlPE Ferriwhittakerite = 7.02 barns/electron U=PE Ferriwhittakerite x r electron = 22.28 barns/cc. Radioactivity: GRapi = 8.94 (Gamma Ray American Petroleum Institute Units) Concentration of Ferriwhittakerite per GRapi unit = 11.19 (%) Estimated Radioactivity from Ferriwhittakerite - barely detectable
rruff.info/rruff_1.0/uploads/AM89_888.pdfFerriwhittakerite is present as relic cores in complex Li-rich amphiboles. Growth replacement and fracture replacement tex-tures are widely observed, where the inner Na-rich and Fe-poor compositions are subsequently replaced by Na-poor and Fe-rich amphiboles. Ferriwhittakerite is bluish black, with vitreous luster. It has
pubs.geoscienceworld.org/msa/.../Ferri-ottoliniite-and-ferriwhittakerite-two-newHolotype ferriwhittakerite [ideally A Na B (NaLi) C (Mg 2 Fe 2 3+ Li) Si 8 O 22 (OH) 2] has a = 9.712(9), b = 17.851(23), c = 5.297(2) Å, β = 103.63°(5), V = 892.5 Å 3, and unit formula A (K 0.13 Na 0.64) B (Na 1.27 Li 0.62 Ca 0.11) C (Mg 1.47 Fe 0.58 2+ Mn 0.12 2+ Zn 0.40 Fe 1.48 3+ Al 0.10 Ti 0.12 Li 0.73) Si 8 O 22 (OH 1.30 F 0.72). The ...
www.researchgate.net/.../236596242_Ferri-ottoliniite_and_ferriwhittakerite_tw...Ferri-ottoliniite and ferriwhittakerite, two new end-members of the new Group 5 for monoclinic amphiboles Article in American Mineralogist 89(5-6):888-893 · May 2004 with 25 Reads
en.wikipedia.org/wiki/Classification_of_silicate_mineralsThis list gives an overview of the classification of minerals (silicates) and includes mostly IMA recognized minerals and its groupings. This list complements the alphabetical list on List of minerals approved by IMA and List of minerals.Rocks, ores, mineral mixtures, non-IMA approved minerals and non-named
webmineral.com/data/Ferri-ottoliniite.shtmlOberti R , Camara F , Caballero J M , American Mineralogist , 89 (2004) p.888-893, Ferri-ottoliniite and ferriwhittakerite, two new end-members of the new, Group 5 for monoclinic amphiboles Physical Properties of Ferri-ottoliniite
www.sciencedirect.com/science/article/pii/S0024493719302488Amphibole from the A1 body was classified by Oberti et al. (2003 and references therein) as sodic-ferripedrizite, sodic-ferri-ferropedrizite, and sodic-ferri-clinoferroholmquistite (hereafter, group-1), whereas amphibole from the northeastern bodies was ascribed to ferri-ottolinite and ferriwhittakerite (Oberti et al., 2004) (hereafter, group-2).
www.mindat.org/loc-13543.htmlArroyo de la Yedra, Manzanares el Real, Community of Madrid, Spain : The episyenites from the Sierra de Guadarrama (Spanish Central System) were formed by the hydrothermal alteration (dequartzification and alkalinization) of granitoids. The alteration took place on a ...