...TH. G. Sahama Abstract From a lava of the extinct volcano Mt. Shaheru in the Belgian Congo, a triclinic. F-bearing Na-Ca-Ti-silicate was described by Sahama and Hytönen (1957 a ) and named götzenite. It was realized that the mineral was related to calcium rinkite that occurs in the lovchorrite...

..., Brazil. Associated minerals are götzenite, nepheline, alkali feldspar, aegirine, natrolite, analcime, and manganoan pectolite. Bortolanite shows complex compositional zoning with götzenite and is visually indistinguishable from götzenite. Bortolanite is pale-yellow to brown and has a vitreous luster...

... compositions of the O and two H sheets are Na 3 Ti(OF)F 2 and Y 2 Ca 2 (Si 2 O 7 ) 2 apfu. Fogoite-(Y) is isostructural with götzenite and hainite. The mineral is named after the type locality, the Fogo volcano in the Azores. * E-mail: [email protected] 24 01 2016 21 03 2016 ©...

..., nepheline, Ti-rich magnetite, fluorapatite, cuspidine–hiortdahlite series minerals, götzenite, khibinskite, monticellite–kirschsteinite series minerals, westerveldite, various sulphides and peralkaline silicate glass. The empirical formula (based on Si + Al + Fe 3+ = 13) of the holotype umbrianite (mean...

..., götzenite, K-Ba- and Ca-Sr-bearing zeolites, fluorite and strontium-rich baryte. Interaction of the early minerals with residual melts and fluids produced Ba-rich phlogopite and Sr-rich apatite. carbonatite magma melt inclusion alkaline basalt element partition F ig . 3. Primitive-mantle...

... Daun, Eifel Mountains, Rhineland-Palatinate (Rheinland-Pfalz), Germany, and named for the old name of the type locality, Liley. Associated minerals are nepheline, leucite, augite, magnetite, fluorapatite, perovskite, götzenite. Lileyite is brown, translucent; streak is white. It forms platy crystals up...

... melanocerite was probably a boron- and fluorine-rich member of the mosandrite–gotzenite or cerite groups. The Subcommission on New Minerals and Mineral Names of the International Mineralogical Association has approved the discreditation of “freyalite”. Copyright © 1985 by the Mineralogical Society of America...

...Figure 5. (a) Raman spectrum of bortolanite with 532 nm laser excitation; (b) its comparison with wöhlerite and götzenite (Lafuente et al ., 2015 ) with 532 nm laser excitation and (c) 780/785 nm laser excitation. ...

... . Sokolova ( 2006 ) wrote the general formula for minerals of Group I as A P 2 M 2 H M 4 O ( Si 2 O 7 ) 2 X 4 O (see Table 1 ). There are eight minerals with known structures in Group I: götzenite, hainite, seidozerite, grenmarite, rinkite, nacareniobsite...

.... (2004) Na 2 Zr 2 Na 2 MnZr(Si 2 O 7 ) 2 O 2 F 2 Na 4 MnZr 3 (Si 2 O 7 ) 2 O 2 F 2 2 (5) Götzenite Sahama and Hytönen (1957) Ca 4 NaCa 2 Ti(Si 2 O 7 ) 2 (OF)F 2 NaCa 6 Ti(Si 2 O 7 ) 2 OF 3 1 (4) Hainite-(Y) Blumrich (1893) (Ca 3 Y)Na(NaCa)Ti(Si 2 O 7 ) 2 (OF)F 2 Na 2 Ca 4 YTi(Si...

... of calcite, quartz, phlogopite (F-rich), and rare, pinkish laths that give an X-ray powder diffraction pattern similar to that of götzenite. The xenoliths were not observed in situ, but all were found in close proximity to one another, among blocks of rock set aside for secondary breakup. This suggests...

... 2 (Ca 1.5 Zr 0.5 )Na(NaCa) Ti(Si 2 O 7 ) 2 (FO)F 2 , is named after its locality at the Bortolan quarry, Minas Gerias, Brazil. Bortolanite belong to the rinkite-group of minerals and is isostructural with fogoite-(Y), kainite-(Y), and götzenite. Bortolanite crystallizes in space group P 1...

... Group-I minerals of known structure: götzenite, hainite, seidozerite, grenmarite, rinkite, nacareniobsite-(Ce), kochite and rosenbuschite ( Table 1 ). The stacking order of TS blocks in Group-I structures is of two types (for details, see Christiansen and Rønsbo, 2000 ): type 1 occurs in rinkite...

... 5.608 7.139 18.575 102.60 P 2/ c 1 (5) götzenite 9.6192 5.7249 7.3307 89.981 101.132 100.639 P 1̅ 1 (4) hainite 9.6079 5.7135 7.3198 89.916 101.077 100.828 P 1̅ 1 (4) kochite 10.032 11.333 7.202 90.192 100.334 111.551 P 1̅ 2 (6...