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obertiite

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Journal Article

Ferri-obertiite from the Rothenberg quarry, Eifel volcanic complex, Germany: mineral data and crystal chemistry of a new amphibole end-member

Roberta Oberti, Massimo Boiocchi, Frank C. Hawthorne, Neil A. Ball, Gȕnter Blass
Published: 01 June 2017
Mineralogical Magazine (2017) 81 (3): 641–651.
DOI: https://doi.org/10.1180/minmag.2016.080.117
...Roberta Oberti; Massimo Boiocchi; Frank C. Hawthorne; Neil A. Ball; Gȕnter Blass Abstract Pink-orange crystals of a composition within the ferri-obertiite compositional space were found in vesicles in a pale beige silicate vein found from a basalt quarry at Mount Rothenberg, Eifel district, Germany...
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Journal Article

FERRO-OBERTIITE, Na Na 2 (Fe 2+ 3 Fe 3+ Ti) Si 8 O 22 O 2 , A NEW MINERAL SPECIES OF THE AMPHIBOLE GROUP FROM COYOTE PEAK, HUMBOLDT COUNTY, CALIFORNIA

Frank C. Hawthorne, Neil A. Ball, Gerald K. Czamanske
Published: 01 April 2010
The Canadian Mineralogist (2010) 48 (2): 301–306.
DOI: https://doi.org/10.3749/canmin.48.2.301
...Frank C. Hawthorne; Neil A. Ball; Gerald K. Czamanske Abstract Ferro-obertiite, Na Na 2 (Fe 2+3 Fe 3+ Ti) Si 8 O 22 O 2 , is a new mineral species of the amphibole group from Coyote Peak, Humboldt County, California, U.S.A., associated with inclusions of lithic-wacke sandstone in an alkali-rich...
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View PDF for article title, FERRO-<span class="search-highlight">OBERTIITE</span>, Na Na 2 (Fe 2+ 3 Fe 3+ Ti) Si 8 O 22 O 2 , A NEW MINERAL SPECIES OF THE AMPHIBOLE GROUP FROM COYOTE PEAK, HUMBOLDT COUNTY, CALIFORNIA
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Journal Article

Solid solution between potassic-obertiite and potassic-fluoro-magnesio-arfvedsonite in a silica-rich lamproite from northeastern Mozambique

Peter Robinson, Arne Solli, Ane Engvik, Muriel Erambert, Bernard Bingen, Henrik Schiellerup, Fernando Njange
Published: 01 December 2008
European Journal of Mineralogy (2008) 20 (6): 1011–1018.
DOI: https://doi.org/10.1127/0935-1221/2008/0020-1874
... solution between potassic-obertiite and potassic-fluoro-magnesio-arfvedsonite. Zoning toward the rims increases the potassic-fluoro-magnesio-arfvedsonite component up to K Na 2 (Mg 3.5 Fe 3+ 1.5 ) Si 8 O 22 (F 1 (OH) 0.5 O 0.5 ). Table 1. Representative EMP analyses in wt. % oxides and unit formulae...
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Journal Article

A new anhydrous amphibole from the Eifel region, Germany: Description and crystal structure of obertiite, NaNa 2 (Mg 3 Fe 3+ Ti 4+ )Si 8 O 22 O 2

Frank C. Hawthorne, Mark A. Cooper, Joel D. Grice, Luisa Ottolini
Published: 01 January 2000
American Mineralogist (2000) 85 (1): 236–241.
DOI: https://doi.org/10.2138/am-2000-0124
...Frank C. Hawthorne; Mark A. Cooper; Joel D. Grice; Luisa Ottolini Abstract Obertiite is a new amphibole species from Bellerberg, Laccher See district, Eifel, Germany. It occurs with tridymite, fluororichterite, hematite, rutile, aegirine-augite, kinoshitalite, and fluor-apatite in vugs in volcanic...
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View PDF for article title, A new anhydrous amphibole from the Eifel region, Germany: Description and crystal structure of <span class="search-highlight">obertiite</span>, NaNa 2 (Mg 3 Fe 3+ Ti 4+ )Si 8 O 22 O 2
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COMPARISON OF SELECTED PHYSICAL PROPERTIES OF FERRO-OBERTIITE AND OBERTIITE...

Published: 01 April 2010
TABLE 5. COMPARISON OF SELECTED PHYSICAL PROPERTIES OF FERRO-OBERTIITE AND OBERTIITEX-R ay P owder -D iffraction P attern
Image
(a) The rock specimen containing holotype ferri-obertiite (scale in cm); (b) pink ferri-obertiite crystals with thin tabular sanidine crystals and alpha quartz paramorphic after beta quartz in an analogous rock specimen from the same quarry (courtesy of Marko Burkhardt; collection: Marko Burkhardt; field of view: 1.5  mm).

( a ) The rock specimen containing holotype ferri-obertiite (scale in cm); ...

Published: 01 June 2017
Fig. 1. ( a ) The rock specimen containing holotype ferri-obertiite (scale in cm); ( b ) pink ferri-obertiite crystals with thin tabular sanidine crystals and alpha quartz paramorphic after beta quartz in an analogous rock specimen from the same quarry (courtesy of Marko Burkhardt; collection
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CHEMICAL COMPOSITION AND UNIT FORMULA OF FERRO-OBERTIITE*

Published: 01 April 2010
TABLE 2. CHEMICAL COMPOSITION AND UNIT FORMULA OF FERRO-OBERTIITE*
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X-RAY POWDER-DIFFRACTION PATTERN OF FERRO-OBERTIITE

Published: 01 April 2010
TABLE 3. X-RAY POWDER-DIFFRACTION PATTERN OF FERRO-OBERTIITE
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SITE POPULATIONS FOR FERRO-OBERTIITE*C hemical C omposition

Published: 01 April 2010
TABLE 4. SITE POPULATIONS FOR FERRO-OBERTIITE*C hemical C omposition
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Possible local configurations around the O3 sites in end-member obertiite; the O3 sites (unshaded circles) are always occupied by O2−.

Possible local configurations around the O3 sites in end-member obertiite; ...

Published: 01 January 2000
F igure 1. Possible local configurations around the O3 sites in end-member obertiite; the O3 sites (unshaded circles) are always occupied by O 2− .
Image
Possible local configurations around the O3 sites in obertiite; the O3 sites can be occupied by O2− or (OH,F). Possible amounts of local configurations compatible with the bulk composition of Table 1 are shown. The unshaded circles are O2−, the unshaded double circles are (OH,F).

Possible local configurations around the O3 sites in obertiite; the O3 site...

Published: 01 January 2000
F igure 2. Possible local configurations around the O3 sites in obertiite; the O3 sites can be occupied by O 2− or (OH,F). Possible amounts of local configurations compatible with the bulk composition of Table 1 are shown. The unshaded circles are O 2− , the unshaded double circles are (OH,F).
Image
(a) A comparison of yangite (Downs et al. 2016) viewed down b with wollastonite-1A (Ohashi and Finger 1978) viewed down c. (b) A comparison of amphibole (obertiite, Hawthorne et al. 2000) with clinepyroxene (diopside, Thompson and Downs 2008), both viewed down c.

( a ) A comparison of yangite ( Downs et al. 2016 ) viewed down b with wo...

Published: 01 November 2016
Figure 12 ( a ) A comparison of yangite ( Downs et al. 2016 ) viewed down b with wollastonite-1 A ( Ohashi and Finger 1978 ) viewed down c . ( b ) A comparison of amphibole (obertiite, Hawthorne et al. 2000 ) with clinepyroxene (diopside, Thompson and Downs 2008 ), both viewed down c .
Journal Article

New Mineral Names,

Dmitriy I. Belakovskiy, Fernando Cámara, Yulia Uvarova, Olivier C. Gagné
Published: 01 February 2018
American Mineralogist (2018) 103 (2): 330–337.
DOI: https://doi.org/10.2138/am-2018-NMN103234
...Dmitriy I. Belakovskiy; Fernando Cámara; Yulia Uvarova; Olivier C. Gagné In this issue This New Mineral Names has entries for 15 new minerals, including abuite, achalaite, arrojadite-(BaNa), burroite, ferri-obertiite, hermannjahnite, jörgkellerite, leószilárdite, magnesiovesuvianite, mianningite...
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Journal Article

Solid solution between potassic alkali amphiboles from the silica-rich Kvaløya lamproite, West Troms Basement Complex, northern Norway

Kåre Kullerud, Dmitry Zozulya, Muriel Erambert, Erling J. K. Ravna
Published: 01 December 2013
European Journal of Mineralogy (2013) 25 (6): 935–945.
DOI: https://doi.org/10.1127/0935-1221/2013/0025-2340
...-magnesio-arfvedsonite, while composition A is a Fe 2+ , Fe 3+ and C Na rich variety of potassic-obertiite. Composition B is characterized by an exceptional high value of C □. It is emphasized that the presence of C □ and C Na in amphibole needs to be confirmed by other methods. The relationship between W O...
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Journal Article

AMPH-IMA04: a revised Hypercard program to determine the name of an amphibole from chemical analyses according to the 2004 International Mineralogical Association scheme

A. Mogessie, K. Ettinger, B. E. Leake
Published: 01 October 2004
Mineralogical Magazine (2004) 68 (5): 825–830.
DOI: https://doi.org/10.1180/0026461046850223
..., which cannot be fitted into the four major amphibole groups. New root-names such as sodic-pedrizite in the Mg-Fe-Mn-Li group and obertiite and dellaventuraite in the sodic group along with two new prefixes, parvo and magno have also been added. As result it has become necessary to modify the AMPH-IMA97...
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Journal Article

Nomenclature of amphiboles: Additions and revisions to the International Mineralogical Associations amphibole nomenclature

Bernard E. Leake, Alan R. Woolley, William D. Birch, Ernst A.J. Burke, Giovanni Ferraris, Joel D. Grice, Frank C. Hawthorne, Hanan J. Kisch, Vladimir G. Krivovichev, John C. Schumacher, Nicholas C.N. Stephenson, Eric J.W. Whittaker
Published: 01 May 2004
American Mineralogist (2004) 89 (5-6): 883–887.
... is herein slightly, but significantly changed from the original idealized formula), necessitate amendments to the IMA 1997 definitions of the Mg-Fe-Mn-Li, calcic, sodic-calcic and sodic groups. The discovery of obertiite and the finding of an incompatibility in the IMA 1997 subdivision of the sodic group...
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Nomenclature of amphiboles: additions and revisions to the International Mineralogical Association’s amphibole nomenclature

B. E. Leake, A. R. Woolley, W. D. Birch, E. A. J. Burke, G. Ferraris, J. D. Grice, F. C. Hawthorne, H. J. Kisch, V. G. Krivovichev, J. C. Schumacher, N. C. N. Stephenson, E. J. W. Whittaker
Published: 01 February 2004
Mineralogical Magazine (2004) 68 (1): 209–215.
DOI: https://doi.org/10.1180/0026461046810182
..., but significantly, from the original idealized formula), necessitate amendments to the IMA 1997 definitions of the Mg-Fe-Mn-Li, calcic, sodic-calcic and sodic groups. The discovery of obertiite and the finding of an incompatibility in the IMA 1997 subdivision of the sodic group, requires further amendments within...
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Nomenclature of amphiboles : additions and revisions to the International Mineralogical Association's amphibole nomenclature

Bernard E. Leake, Alan R. Woolley, William D. BIRCH, Ernst A.J. BURKE, Giovanni FERRARIS, Joel D. GRICE, Frank C. HAWTHORNE, Hanan J. KISCH, Vladimir G. KRIVOVICHEV, John C. SCHUMACHER, Nicholas C.N. STEPHENSON, Eric J.W. WHITTAKER
Published: 01 January 2004
European Journal of Mineralogy (2004) 16 (1): 191–196.
DOI: https://doi.org/10.1127/0935-1221/2004/0016-0191
..., such as sodicpedrizite (which is herein slightly, but significantly changed from the original idealised formula), necessitate amendments to the IMA 1997 definitions of the Mg-Fe-Mn-Li, calcic, sodic-calcic and sodic groups. The discovery of obertiite and the finding of an incompatibility in the IMA 1997 subdivision...
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NOMENCLATURE OF AMPHIBOLES: ADDITIONS AND REVISIONS TO THE INTERNATIONAL MINERALOGICAL ASSOCIATION’S 1997 RECOMMENDATIONS

Bernard E. Leake, Alan R. Woolley, William D. Birch, Ernst A.J. Burke, Giovanni Ferraris, Joel D. Grice, Frank C. Hawthorne, Hanan J. Kisch, Vladimir G. Krivovichev, John C. Schumacher, Nicholas C.N. Stephenson, Eric J.W. Whittaker
Published: 01 December 2003
The Canadian Mineralogist (2003) 41 (6): 1355–1362.
DOI: https://doi.org/10.2113/gscanmin.41.6.1355
... is herein slightly, but significantly, changed from the original idealized formula), necessitate amendments to the IMA 1997 definitions of the Mg–Fe–Mn–Li, calcic, sodic-calcic and sodic groups. The discovery of obertiite and the finding of an incompatibility in the IMA 1997 subdivision of the sodic group...
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Journal Article

New Mineral Names

Glenn Poirier, Kimberly T. Tait, Ralph Rowe
Published: 01 May 2011
American Mineralogist (2011) 96 (5-6): 936–945.
DOI: https://doi.org/10.2138/am.2011.576
...(80,041,123,1̅33), 3.867(70,1̅31,121), and 3.664(70,030). F.C. Hawthorne, N.A. Ball, and G.K. Czamanske (2010) Ferro-obertiite, Na Na 2 (Fe 3 2+ Fe 3+ Ti) Si 8 O 22 O 2 , a new mineral species of the amphibole group from Coyote Peak, Humboldt county, California. Can. Mineral, 48, 301–306. Ferro...
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