 | Biagioni, C., Bonaccorsi, E., Merlino, S., Parodi, G. C., Perchiazzi, N., Chevrier, V., Bersani, D. (2010) Roumaite, (Ca,Na,◻)3(Ca,REE,Na)4(Nb,Ti)[Si2O7]2(OH)F3, from Rouma Island, Los Archipelago, Guinea: A new mineral species related to dovyrenite. The Canadian Mineralogist, 48 (1) 17-28 doi:10.3749/canmin.48.1.17 | Journal (article/letter/editorial) | | Na)4(Nb,Ti)[Si2O7]2(OH)F3, FROM ROUMA ISLAND, LOS ARCHIPELAGO, GUINEA: A NEW MINERAL SPECIES RELATED TO...peralkaline nepheline syenites on Rouma Island, in the Los Archipelago, in Guinea; associated minerals are aegirine...structure, OD character, agpaitic syenite, Los Archipelago, Guinea. Sommaire La roumaïte, (Ca,Na‚□)3(Ca,REE...hyperalcalines de l'île de Rouma, complexe magmatique de l’archipel de Los, en Guinée. Lui sont associés...archipel de Los, Guinée. Introduction The Los Archipelago is located 5 km offshore of Conakry, capital |  | | Report (issue) | | given as "traces." In most of these analyses their augite, or magn.etite; P 20 5 , if it contains apatite...constitue:p.ts, barium along the Rocky Mountain region than in the but only those essential to a proper...correction applied to be advisable in investigating a region, locality, or to the ferrous oxide in the most...determination of manpresence or absence in the region or in the various 1nagmas ~s of most iinportance...liability to error in alumina involved in the acetate region in its n.1ain features and a sufficient knowledge |  | | Book | | Mexico Pages 160-161: Elbaite crystals from the island of Elba, Italy Pages 244-245: Whewellite crystals...the Passo del Rombo in the Trentino-Alto Adige region of Italy, or the splendid crystals of azure-blue...Sicily There are large deposits of sulfur on the island of Sicily, most of all in the provinces of Agrigento...1500, the area of Baveno in the northern Italian region of Piedmont, was famous throughout Europe for the... Top: Panorama of iron mines near Rio Marina on the island of Elba, Italy. Above: Exposed pegmatite vein on | | | Book | | Mexico Pages 160-161: Elbaite crystals from the island of Elba, Italy Pages 244-245: Whewellite crystals...the Passo del Rombo in the Trentino-Alto Adige region of Italy, or the splendid crystals of azure-blue...Sicily There are large deposits of sulfur on the island of Sicily, most of all in the provinces of Agrigento...1500, the area of Baveno in the northern Italian region of Piedmont, was famous throughout Europe for the...Panorama of iron mines near Rio Marina on the island of Elba, Italy. Above: Exposed pegmatite vein on |  | | Book | | mineralogical fame and significance, as in the case of the island of Laven in the Langesundfjord District of Norway...named Monteregie is now the current name of the region. he name Mont Saint-Hilaire is used interchangeably...what is now the Richelieu River and Lake Champlain region, Samuel de Champlain first named the mountain Mont...Monteregian Hills (see below) remained exposed as islands in the sea; sand beaches can be found on the mountain's...protecting the only remaining primeval forest in the region. THE EARLY SCIENTIFIC INVESTIGATIONS T he earliest |  | | Journal (volume) | | the diorites consists of euhedral plagioclase, augite and hornblende set in a granophyric ground mass...the diorites consists of euhedral plagioclase, augite, and hornblende set in a granophyric ground mass...look. What do you see?” There was something in the region where Jim was pointing; but what? “You should get...obscure pegmatite on Rouma Island in the Los Archipelago off the coast of Guinea, and many other localities... Sperrylite from the Talnakh orefield, Norilsk region, eastern Siberia, Russia. Mineralogical Record |  | 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) | | Tuscon, Arizona. Barry Yampol: Oyster Bay, Long Island, New York. Victor Yount: Warrenton, Virginia. Josef...Creek, NT. In New Zealand, Hauraki Peninsula, North Island, and placer deposits in Nelson, Westland, Otago...Emperor mine, Vatukuola, Fiji. Mt. Kare, Papua New Guinea. In South America, Antioquia and Cauca, Colombia;...nm); weakly anisotropic. Bolshoi Anyui R.., Kolyma region, Russia, in gold-bearing alluvium. sm MZ 11(4):88(1989)...VHNjo9 = 260. R = 55.3 (540 nm). Magnetic. Kumak region, Southern Ural Mts., Russia, in quartz veins with |
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