 | | Journal (article/letter/editorial) | | Al)O4tetrahedra (Tl), is mainly occupiedby K. When osumilite contains octahedralAl, a high concentration of...site to be optically negarive. INrnonuc:rroN Osumilite (Miyashiro, 1956),with the crystal-chemical formula'...are assumedto be vacant in osumilites. Although osumilite was considered a rare mineral 10 years ago, today...formations. The stability of synthetic K-Mg-bearing osumilite has been experimentally establishedto lie betweenca...suggestsa very low/rro. Although a largenumber of osumilite occurrenceshave been reported and the chemical |  | Balassone, Giuseppina, Mormone, Angela, Rossi, Manuela, Bernardi, Alessandro, Fisch, Martin, Armbruster, Thomas, Malsy, Anna, Kathrin Berger, Alfons (2008) Crystal chemical and structural characterization of an Mg-rich osumilite from Vesuvius volcano (Italy) European Journal of Mineralogy, 20 (5) 713-720 doi:10.1127/0935-1221/2008/0020-1839 | Journal (article/letter/editorial) | | characterization of an Mg-rich osumilite from Vesuvius volcano (Italy) Giuseppina BALASSONE1 *, Angela...Federico II, Via Mezzocannone 8, 80134 Naples, Italy *Corresponding author, e-mail: balasson@unina.it...3012 Bern, Switzerland Abstract: At Vesuvius, osumilite, (K, Na)(Fe, Mg)2 (Al, Fe, Mg)3 (Si, Al)12 O30...the 19th century. Chemical analysis shows that osumilite is homogeneous and characterized by high Mg numbers...consistent with space group P6/mcc. Key-words: osumilite, Vesuvius, double-ring silicates, crystal chemistry |  | | Journal (article/letter/editorial) | | akmitische Pyroxene auch erwiesen sind. Summary Osumilite in the Eifel and the Usage o f this Mineral as...0.86, the porphyroblastic osumilite being the richest in Mg. One osumilite, which has optically negative...edges, shows M = O.17 and is the most iron-rich osumilite known thus far; in addition, it has the lowest...PT-stability range of magnesio-osumilite is considerably larger than that of ferro-osumilite, similarly as for the...Eifelite, KNa3Mg4Si12030, a new mineral of the osumilite group with octahedral sodium. Contr. Min. Petrol |  | Hawthorne, Frank C., Kimata, Mitsuyoshi, Cerny, Petr, Ball, Neil, Rossman, George R., Grice, Joel D. (1991) The crystal chemistry of the milarite-group minerals. American Mineralogist, 76 (11-12) 1836-1856 | Journal (article/letter/editorial) | | that includes osumilite. In the last ten years, it has been recognized that osumilite is much more common...Eifelite Merrihueite Synthetic Milarite Osumilite Osumilite-(Mg) Poudretteite Roedderite Sogdianite Sugilite...rOro]cluster ideally occupiedby Si. However, armenite, osumilite, and (Fig. 3), surrounded by 18 O atoms arrangedat...amount of more recentwork refersto minerals of the osumilite group. Al at the Tl site:Al,, : 7.71,t1-O) - 1...armenite. filled [A, B, C, Tl, and T2] than does osumilite [A, C, Tl, and T2l, which makes milarite more |  | | Book (edition) | | expressed in abbreviations: Rep. (republic), prov. (province), co. (county), munic. (municipio), pref. (prefecture)...the revolution in 1997. Its mineral rich Katanga province was renamed Shaba by Mobutu, and is now the Katanga...Katanga administrative region again. The former Kivu province is now divided to three regions: INTRODUCTION...conditions in the gold-bearing "greenstone" in Abitibi province in northern Ontario and Quebec. Some genetic problems...Menzenschwand Scbwarzwald Mts., in the Sailauf quarry, Spessart Mts., Bavaria. both Germany, and from |  | | Book | | MineralogicalRecord.com I IIMORIITE-(Y) EUROPE FRANCE Trimouns quarry, Luzenac, Ariege. Operated for talc since the beginning...beginning of the 20th century, the Trimouns quarry became well known to collectors around 1990 for the...2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series...1991). Simdeled, Aust-Agder. Early in 1999, in a quarry near S~ndeled, collectors opened a pocket containing...PORTUGAL Montijos quarry, Monte Redondo, Leiria Estremadura. The Montijos gabbro quarry at Monte Redondo |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Short Hills, New Jersey. Renato Pagano: Milan, Italy. Ole V. Petersen: Geologisk Museum, Copenhagen,...British Columbia NF Labrador (part of Newfoundland Province) MB Manitoba NB New Brunswick NF Newfoundland...and Schemnitz, Czech Republic; Monte Narba, Sardinia, Italy; Smeingorsk, Semenowsky, and Altai, Siberia...metallic luster. G = 3.147. Mt. Etna and Mt. Vesuvius, Italy. Bm DI:126, ZK 74:511(1930). 1.1.18.2 Named Roaldite...well-developed crystals; Vulecano, Lipari Is., Italy, in fumaroles. BM DI:145, ACB 30:1396(1974), ABI:4L6 |
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Funtanafigu Quarry, Marrubiu, Oristano Province, Sardinia, Italy