 | Ertl, A., Rossman, G. R., Hughes, J. M., London, D., Wang, Y., O'Leary, J. A., Dyar, M. D., Prowatke, S., Ludwig, T., Tillmanns, E. (2010) Tourmaline of the elbaite-schorl series from the Himalaya Mine, Mesa Grande, California: A detailed investigation. American Mineralogist, 95 (1) 24-40 doi:10.2138/am.2010.3271 | Journal (article/letter/editorial) | | Tourmaline of the elbaite-schorl series from the Himalaya Mine, Mesa Grande, California: A detailed investigation...and Planetary Sciences, California Institute of Technology, Pasadena, California 91125-2500, U.S.A. 3 Office...on tourmalines from gem pockets in the Himalaya mine, San Diego County, California, including a strongly...tourmaline decrease. The black core is a Mn-bearing “oxy-schorl.” The grayish-yellow, intermediate zone is Mn-rich...(Fe2++Mn2+) content in tourmalines from the elbaite-schorl series (r2 = 0.99). Values lower than 15.84 Å for |  | | Journal (article/letter/editorial) | | State University, Baton Rouge, Louisiana 70803, USA Abstract: The Si4þ cation, typically the overwhelming...A) were described from a V-, Cr-, and Mg-bearing oxy-tourmaline from the Sludyanka crystalline complex...higher amounts of [4]Al were found in Li-bearing schorl (0.17 apfu [4]Al, 〈T–Oi = 1.623(1) A) from the...(Bosi et al., 2005) and from a Mn- and Li-bearing schorl (0.24 apfu [4]Al, 〈T–Oi = 1.624(1) A) from a...al., 2010). Another tourmaline sample, a Mg-rich schorl (#108749) from a syenite pegmatite from the Raglan |  | | Report (issue) | | International, LLC P.O. Box 263, East Hampton, CT 06424, USA Phone 1.860.267.1512; fax 1.860.267.7225 www.lapisint...microcline from Pakistan's world famous Gilgit area. The schorl is 4. 7 cm high. Photo Jeff Scovil; private collection...elbaite crystals with lepidolite from the Golconda Mine in Minas Gerais, Brazil by Eberhard Equit, 1993...CHRISTIAN WEISE VERLAG, GERMANY AND LAPIS INTERNATIONAL, USA Tourmaline ♦ History ♦ Mineralogy • Tourmaline...this crown was not a ruby, but a tourmaline. The gem in this crown is now the oldest known important tourmaline |  | | Journal (article/letter/editorial) | | the Mulungu mine, Brazil; (3) Cu- and Bi-bearing tourmalines from the Alto dos Quintos mine, Brazil. Two...other pegmatites, like the Himalaya mine pegmatite in Mesa Grande, Ca, USA [37]. The average charge of...occupants (Na, Ca and K) of different tourmalines (oxy-schorl, fluor-elbaite, elbaite) from this pegmatite...tourmalines from the Minh Tien pegmatite, Luc Len district, Vietnam (samples from [33]). Figure 2. Correlation...tourmalines from the Minh Tien pegmatite, Luc Len district, Vietnam (samples from [33]). Copper-bearing |  | | Journal (article/letter/editorial) | | ______ Alkali group Schorl Fluor-schorl “Oxy-schorl”* Dravite Fluor-dravite “Oxy-dravite”* Chromium-dravite...basis for the secondary groups: hydroxy, fluor and oxy groups; these are defined as follows: hydroxy: OH1–...F1–; fluor: OH1– + F1– ≥ O2– and F1– ≥ OH1–, and oxy: O2– > OH1– + F1– (Henry et al. 2009). Spectroscopic...secondary tourmaline groups: hydroxy, fluor and oxy groups (Henry et al. 2009). A histogram of F contents...alkali-group tourmalines: fluor-dravite, fluor-schorl, “fluor-elbaite” and fluor-buergerite (Table 1) |  | | Journal (article/letter/editorial) | | International Mineralogical Association (IMA). These include oxy-species characterized by high contents of Al3+, Cr3+...Fluor-liddicoatite Ca(Li2Al)Al6Si6O18(BO3)3(OH)3F Fluor-schorl NaFe2+ 3 Al6Si6O18(BO3)3(OH)3F Fluor-tsilaisite...NaAl3Al6Si6O18(BO3)3O3OH Oxy-chromium-dravite NaCr3(Cr4Mg2)Si6O18(BO3)3(OH)3O Oxy-dravite Na(Al2Mg)(Al5...3O Oxy-foitite o(Al2Fe2+)Al6Si6O18(BO3)3(OH)3O Oxy-schorl Na(Fe2+ 2 Al)Al6Si6O18(BO3)3(OH)3O Oxy-vanadium-dravite...H)3O Rossmanite o(Al2Li)Al6Si6O18(BO3)3(OH)3OH Schorl NaFe2+ 3 Al6Si6O18(BO3)3(OH)3OH Tsilaisite NaMn2+ |  | | Journal (article/letter/editorial) | | DOI: 10.1127/ejm/2017/0029-2631 PrePub Article 2 Oxy-foitite, □(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3O, a new...HENRIK SKOGBY2 and ULF HÅLENIUS2 1 4 Abstract: Oxy-foitite, □(Fe2þAl2)Al6(Si6O18)(BO3)3(OH)3O, is a...luster, sub-conchoidal fracture and gray streak. Oxy-foitite has a Mohs hardness of ∼7, and has a calculated...light, oxy-foitite is pleochroic (O = dark brown and E = pale brown), uniaxial negative. Oxy-foitite...= 1573.20(6) Å3, Z = 3. The crystal structure of oxy-foitite was refined to R1 = 1.48% using 3247 unique |  | Novák, M., Ertl, A., Povondra, P., Galiová, M. V., Rossman, G. R., Pristacz, H., Prem, M., Giester, G., Gadas, P., Škoda, R. (2013) Darrellhenryite, Na(LiAl2)Al6(BO3)3Si6O18(OH)3O, a new mineral from the tourmaline supergroup. American Mineralogist, 98 (10) 1886-1892 doi:10.2138/am.2013.4416 | Journal (article/letter/editorial) | | and Planetary Sciences, California Institute of Technology, Pasadena, California 91125-2500, U.S.A. 1 ...Li-bearing tourmaline species, which belongs to the oxy-tourmaline series as do povondraite and chromo-alumino-povondraite...more recently described minerals, oxy-schorl (Bačík et al. 2013) and oxy-dravite (Bosi and Skogby 2012)...Agilent 7500ce (Agilent Technologies, Santa Clara, California, U.S.A.) quadrupole ICP-MS with an attached UP...ablation system (New Wave Research, Inc., Fremont, California, U.S.A.). The samples were placed into a SuperCell |  | Bačík, P., Cempírek, J., Uher, P., Novak, M., Ozdín, D., Filip, J., Novák, R., Breiter, K., Klementová, M., Ďud’a, R., Groat, L. A. (2013) Oxy-schorl, Na(Fe2+2Al)Al6Si6O18(BO3)3(OH)3O, a new mineral from Zlata Idka, Slovak Republic and Pribyslavice, Czech Republic. American Mineralogist, 98 (2) 485-492 doi:10.2138/am.2013.4293 | Journal (article/letter/editorial) | | Mineralogist, Volume 98, pages 485–492, 2013 Oxy-schorl, Na(Fe2+ 2 Al)Al6Si6O18(BO3)3(OH)3O, a new mineral...Bystrická 87, 040 11 Košice, Slovakia 1 Abstract Oxy-schorl (IMA 2011-011), ideally Na(Fe2+ 2 Al)Al6Si6O18(BO3)3(OH)3O...brownish black subhedral, columnar crystals of oxy-schorl, up to 1 cm in size, arranged in thin layers...orthogneiss associated with Kfs+Ab+Qtz+Ms+Bt+Grt. Oxy-schorl from both localities has a Mohs hardness of 7...(Přibyslavice), respectively. In plane-polarized light, oxy-schorl is pleochroic; O = green to bluish-green, E = |  | Gadas, P., Novak, M., Stanek, J., Filip, J., Galiova, M. V. (2012) Compositional Evolution of Zoned Tourmaline Crystals from Pockets in Common Pegmatites of the Moldanubian Zone, Czech Republic. The Canadian Mineralogist, 50 (4) 895-912 doi:10.3749/canmin.50.4.895 | Journal (article/letter/editorial) | | (foitite – schorl – magnesio-foitite), intermediate zone (schorl – dravite) and narrow outer rim (schorl – dravite);...classifications of granitic pegmatites. Keywords: foitite, schorl, dravite, magnesio-foitite, compositional evolution...the simplified sequence dravite–schorl–foitite ! schorl–olenite ! schorl–elbaite ! elbaite ! rossmanite...typically show the compositional trend foitite ! schorl ! dravite ! magnesio-foitite from core to rim,...te + boralsilite + werdingite + dumortierite + schorl) cutting leucogranulite, which postdates the development |  | Bosi, F., Skogby, H., Agrosi, G., Scandale, E. (2012) Tsilaisite, NaMn3Al6(Si6O18)(BO3)3(OH)3OH, a new mineral species of the tourmaline supergroup from Grotta d'Oggi, San Pietro in Campo, island of Elba, Italy. American Mineralogist, 97 (5) 989-994 doi:10.2138/am.2012.4019 | Journal (article/letter/editorial) | | of the tourmaline supergroup from Grotta d’Oggi, San Pietro in Campo, island of Elba, Italy Ferdinando...of a LCT-type pegmatite body from Grotta d’Oggi, San Pietro in Campo, island of Elba, Italy, in association...with quartz, K-feldspar, plagioclase, elbaite, and schorl. Crystals are greenish yellow with a vitreous luster...long-expected new mineral tsilaisite, from Grotta d’Oggi, San Pietro in Campo, Elba, Italy. In his work on tourmaline...yellow tourmalines, was derived from the Tsilaisina mine in the Sahatany Valley (Madagascar) where the first |  | Lussier, Aaron, Ball, Neil A., Hawthorne, Frank C., Henry, Darrell J., Shimizu, Rentaro, Ogasawara, Yoshihide, Ota, Tsutomu (2016) Maruyamaite, K(MgAl2)(Al5Mg)Si6O18(BO3)3(OH)3O, a potassium-dominant tourmaline from the ultrahigh-pressure Kokchetav massif, northern Kazakhstan: Description and crystal structure. American Mineralogist, 101 (2) 355-361 doi:10.2138/am-2016-5359 | Journal (article/letter/editorial) | | 24 2) (Al5Mg)(BO3)3(Si6O18)(OH)3O, is related to oxy-dravite: ideally Na(MgAl2)(Al5Mg)(BO3)3(Si6O18) (OH)3O...K(MgAl2)(Al5Mg)(BO3)3(Si6O18) (OH)3O, is the K analog of oxy-dravite, ideally Na(MgAl2)(Al5Mg) (BO3)3(Si6O18)(OH)3O...and Lucchesi, S. (2004) Crystal chemistry of the schorl-dravite series. European Journal of Mineralogy... 92, 1054–1063. Bosi, F., and Skogby, H. (2013) Oxy-dravite, Na(Al 2Mg)(Al 5Mg)(Si 6O 18) (BO3)3(OH)3O...tourmaline group from the Crabtree emerald mine, Mitchell county, North Carolina: Description and crystal |  | | Journal (article/letter/editorial) | | magnesio-foitite o(Mg2Al)Al6Si6O18(BO3)3(OH)3OH, oxy-uvite CaMg3Al6Si6O18(BO3)3(OH)3O, and olenite Na...K0ʹ = 5.0(5); K-dravite K0 = 109(4), K0ʹ = 4.3(2); oxy-uvite K0 = 110(2), K0ʹ = 4.1(1); magnesio-foitite...equation of state parameters Dravite K-dravite Oxy-uvite Magnesio-foitite Olenite K0 (GPa) K0′ 97(6)...a Elbaite-schorl 119 1542 Pandy and Schreuer (2012) a Elbaite-schorl 118 1542 Elbaite-schorl 117 a 1568...1568 a Schorl-dravite 116 1578 a Schorl-dravite 118 1578 a Schorl 120 1553 Tatli and Özkan (1987) a Elbaite |  | | Journal (article/letter/editorial) | | Thermally induced cation redistribution in Fe‑bearing oxy‑dravite and potential geothermometric implications...Springer-Verlag Berlin Heidelberg 2016 Abstract Iron-bearing oxy-dravite was thermally treated in air and hydrogen...octahedrally coordinated Y and Z sites, an Fe3+-bearing oxy-dravite sample was thermally treated in air or hydrogen...respectively. The Fe3+-bearing oxy-dravite of the present study was taken from oxy-dravite holotype material...refinement Crystal fragments of the heat-treated oxy-dravite (samples H2 and AIR) were selected for X-ray |  | Ertl, Andreas, Schuster, Ralf, Hughes, John M., Ludwig, Thomas, Meyer, Hans-Peter, Finger, Friedrich, Dyar, M. Darby, Ruschel, Katja, Rossman, George R., Klötzli, Urs, Brandstätter, Franz, Lengauer, Christian L., Tillmanns, Ekkehart (2012) Li-bearing tourmalines in Variscan granitic pegmatites from the Moldanubian nappes, Lower Austria. European Journal of Mineralogy, 24 (4) 695-715 doi:10.1127/0935-1221/2012/0024-2203 | Journal (article/letter/editorial) | | Geology, University of Vermont, Burlington, VT 05405, USA 4 Institut für Geowissenschaften, Im Neuenheimer...Hadley, MA 01075, USA 7 Division of Geological and Planetary Sciences, California Institute of Technology...Technology, Pasadena, CA 91125-2500, USA 8 Department of Lithospheric Research, Geozentrum, Universität Wien...The tourmalines can be classified as fluor-schorl, schorl, foitite, magnesiofoitite, olenite and ‘‘fluor-elbaite’’...the colour, black tourmaline was identified as schorl by Sigmund (1937). It forms crystals up to 17 |  | | Journal (issue) | | FEATURE ARTICLES 2 A New Method for Determining Gem Tourmaline Species by LA-ICP-MS Ziyin Sun, Aaron...a simplified but comprehensive classification of gem tourmaline species based on quantitative measurement...Documents a visit to the sapphire, opal, and emerald mining and trading areas of Ethiopia. REGULAR FEATURES...in opal • Trapiche-like ruby from the Batakundi mine in Kashmir • Sapphire inclusion with rutile “silk”...Orpiment in barite 118 Gem News International Tucson 2019 • Boulder opal mining • Brazilian alexandrite |  | | Journal (article/letter/editorial) | | divalent cation Mg2+ and Fe2+.” The end-member oxy-schorl NaY(Al2Fe2+) Z (Al5Fe2+)Si6O18(BO3)3(OH)3O was...values of Andreozzi et al. (2008) may be due to oxy-varieties, for which the first coordination sphere...of Andreozzi et al. (2008) has ZFe2+ without an oxy-component. (4) With respect to the criticism on doublets...Mössbauer and structural parameters in elbaite-schorl-dravite tourmalines. American Mineralogist, 93... (1999) Linking structure and chemistry in the schorl-dravite series. American Mineralogist, 84, 922–928 |  | | Journal (article/letter/editorial) | | internal structure and minor tourmaline (Al-rich schorl) with accessory fluorapatite and allanite (Novák...ilmenite, titanite, and black tourmaline (dravite to schorl) along with a wide spectrum of accessory minerals...tourmaline composition (Ca, Ti-rich Al-poor dravite–schorl; Škoda et al. 2006; Novák et al. 2011). The δ11B...substitution (4) and abundance of oxy-tourmaline components. Oxy-schorl is a typical tourmaline of various...Al b Elbaite Olenite Oxy-dravite Magnesio-foitite Oxy-schorl Foitite Schorl Buergerite Ca Na + K |  | | Journal (article/letter/editorial) | | alkaline group, such as Fe-free dravite, Fe3+-bearing schorl and oxydravite, were thermally treated in air or...environment of formation, for example, the name schorl is commonly associated with granites, elbaite with...• Fe-bearing oxy-dravite showed Fe–Mg site redistribution (Bosi et al. 2016b); • schorl and lucchesiite...14 tot−max/ apfu for oxy-dravite, 0.25 apfu for fluor-elbaite, 0.37 apfu for schorl and lucchesiite. Their...of the sample thermal history, corresponding to schorl at relatively low temperatures by the possible |  | Ertl, A., Kolitsch, U., Dyar, M. D., Hughes, J. M., Rossman, G. R., Pieczka, A., Henry, D. J., Pezzotta, F., Prowatke, S., Lengauer, C. L., Korner, W., Brandstatter, F., Francis, C. A., Prem, M., Tillmanns, E. (2012) Limitations of Fe2+ and Mn2+ site occupancy in tourmaline: Evidence from Fe2+- and Mn2+-rich tourmaline. American Mineralogist, 97 (8) 1402-1416 doi:10.2138/am.2012.4028 | Journal (article/letter/editorial) | | Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena 91125-2500...mined in 1994–1995 in the Fosso dei Forcioni, near San Ilario (Sant’Ilario) in Campo, on Elba, Italy (Orlandi...and polychrome tourmalines (elbaite-rossmanite-schorl series) up to 2.5 cm in length. Accessory minerals...tourmalines (98114: elbaite, 108796: dravite, 112566: schorl). Compositions of these tourmaline samples are...(O2-bearing) atmosphere we heated ~32 mg powder of the schorl sample up to 1100 °C under air. 32 million. Spectra |  | | Report (chapter) | | Morari Crystalline Complex (TMCC), Eastern Ladakh Himalaya. Except schorlitic tourmaline , the brown-green...quartz, HP/UHP metamorphism, Tso Morari, Ladakh Himalaya, India A Introduction Tourmaline, XY3Z6(T6O18)(BO3)3V3W...the Western Alps at 2.7 GPa, 600-630°C, and UHP oxy-schorlitic tourmaline from the Erzgebirge in Germany...eclogites is exposed in the eastern part of Ladakh Himalaya between the Indus Suture Zone (ISZ) to the northeast...northeast U and the Zanskar Tethys Himalaya to the southeast (Fig. 1a, b). The enclaves of UHP eclogites |  | | Journal (article/letter/editorial) | | Louisiana State University, Baton Rouge, LA, 70803, USA; Dutrow@lsu.edu * Corresponding author Tourmaline...Fe3+ for Al in deprotonated tourmalines along the oxy-dravite to povondraite join (O–P trend) is generally...Species (X) Alkali group Schorl Fluor-schorl Oxy-schorl Dravite Fluor-dravite Oxy-dravite Elbaite Fluor-elbaite...Si6O18 Si6O18 Ca Ca Ca X-site vacant group Foitite Oxy-foitite Magnesio-foitite Rossmanite Fe2+3 Li2Al...Deprotonated tourmaline compositions that range from oxy-dravite to povondraite (O–P trend; Tab. 1), described |  | | Report (volume) | | assemblages 376 Tourmaline stability in magmas: Schorl-dravite 377 Acknowledgments 379 References 379...Geothermal Systems Evaporites Tourmaline General Broken Hill (Australia) Barberton (South Africa) Evolution of...Boron (Kramer), California and Turkey; (2) brine deposits, notably Searles Lake, California; (3) salar deposits...(1957) Ginorite and sassolite from Death Valley, California. Am Mineral 42:56-61 Anthony JW, Bideaux RA,...pentaborate sheet structure from the Tuzla salt mine, Bosnia and Hercegovina. Am Mineral 79:562-569 Beukes |  | | Journal (article/letter/editorial) | | tourmaline in generation II veins is rich in an “oxy-foitite” component. Foitite-rich tourmaline in generation...Keywords: Singhbhum shear zone, kyanite, foitite, “oxy-foitite,” boron-infiltration iNtroductioN Rocks...apfu), together with the hypothetical “oxy” analogues of schorl, foitite, and other common tourmaline...formulas of different tourmaline species End-members: Schorl Dravite Olenite Uvite “Hydroxy-feruvite” Foitite...Hypothetical end-members*: “Oxy-schorl” Na Fe22+Al Al6 Si6O18 (BO3)3 (OH)3 (O) “Oxy-dravite” Na Mg2Al Al6 Si6O18 |  | Shakerardakani, Farzaneh, Li, Xian-Hua, Neubauer, Franz, Ling, Xiao-Xiao, Li, Jiao, Monfaredi, Behzad, Wu, Li-Guang (2020) Genesis of early cretaceous leucogranites in the Central Sanandaj–Sirjan zone, Iran: Reworking of Neoproterozoic metasedimentary rocks in an active continental margin. Lithos, 352. 105330 doi:10.1016/j.lithos.2019.105330 | Journal (article/letter/editorial) | | 00 a.p.f.u. Fe2+) and falls close to the schorl/oxy-schorl end-member composition on an Fe–Al–Mg plot...leucogranite magmatism in the Langtang Valley, Nepal Himalaya. Journal of Petrology 34, 345–368. Kargaranbafghi |
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