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1-20 OF 29 RESULTS FOR
magnesiodumortierite
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Journal Article
Synthetic [4] B-bearing dumortierite and natural [4] B-free magnesiodumortierite from the Dora-Maira Massif: differences in boron coordination in response to ultrahigh pressure Available to Purchase
Bernd Wunder, Martin Kutzschbach, Luisa Hosse, Franziska D.H. Wilke, Hans-Peter Schertl, Christian Chopin
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2018
European Journal of Mineralogy (2018) 30 (3): 471–483.
...-dumortierite, magnesiodumortierite from the Dora-Maira Massif, which is assumed to have formed at similar conditions (2.5–3.0 GPa, 700 °C), does not show any B-excess. Tourmaline shows an analogous behaviour in that magnesium-rich ( e.g ., dravitic) tourmaline formed at high pressure shows no or only minor...
Includes: Supplemental Content
Journal Article
Magnesiodumortierite, a new mineral from very-high-pressure rocks (Western Alps); II, Crystal chemistry and petrological significance Available to Purchase
Christian Chopin, Giovanni Ferraris, Gabriella Ivaldi, Hans-Peter Schertl, Werner Schreyer, Roberto Compagnoni, Cameron Davidson, Andrew M. Davis
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 June 1995
European Journal of Mineralogy (1995) 7 (3): 525–535.
Journal Article
Magnesiodumortierite, a new mineral from very-high-pressure rocks (Western Alps); Part I, Crystal structure Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 February 1995
European Journal of Mineralogy (1995) 7 (1): 167–174.
Image
Photomicrograph (plane-polarized light) of coexisting magnesiodumortierite ... Available to Purchase
in Synthetic [4] B-bearing dumortierite and natural [4] B-free magnesiodumortierite from the Dora-Maira Massif: differences in boron coordination in response to ultrahigh pressure
> European Journal of Mineralogy
Published: 01 May 2018
Fig. 2 Photomicrograph (plane-polarized light) of coexisting magnesiodumortierite (Mg–du) and ellenbergerite (el) inclusions in pyrope (py) from the Dora-Maira Massif, Western Alps, Italy (sample DM-du II). Further abbreviation: rt = rutile; ky = kyanite; chl = chlorite.
Image
Octahedral cation contents in the fibers from rose quartz (this study), cla... Available to Purchase
in Fibrous nanoinclusions in massive rose quartz: HRTEM and AEM investigations
> American Mineralogist
Published: 01 February 2002
F igure 8. Octahedral cation contents in the fibers from rose quartz (this study), classic dumortierite ( Alexander et al. 1986 ), and magnesiodumortierite ( Chopin et al. 1995 ).
Journal Article
The dumortierite supergroup. I. A new nomenclature for the dumortierite and holtite groups Available to Purchase
Journal: Mineralogical Magazine
Published: 01 August 2013
Mineralogical Magazine (2013) 77 (6): 2825–2839.
... occupancy of the Al1 site is critical. (1) Dumortierite group, with Al1 = Al 3+ , Mg 2+ and □, where □ denotes cation vacancy. Charge balance is provided by OH substitution for O at the O2, O7 and O10 sites. In addition to dumortierite, endmember composition AlAl 6 BSi 3 O 18 , and magnesiodumortierite...
Journal Article
Fe 2+ -Ti 4+ charge-transfer in dumortierite Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2000
European Journal of Mineralogy (2000) 12 (3): 521–528.
... and electron-microprobe analysis in order to elucidate the origin of colour and pleochroism: (a) deep blue dumortierite from Sahatany, Madagascar, (b) red magnesiodumortierite from Dora-Maira, Western Alps, and (c) deep violet dumortierite from Arizona, USA. The Fe and Ti contents are, respectively, 0.020...
Journal Article
STRUCTURE AND TOPOLOGY OF DUMORTIERITE AND DUMORTIERITE-LIKE MATERIALS Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 October 2012
The Canadian Mineralogist (2012) 50 (5): 1197–1231.
.... Smaller triangular channels contain planar BO 3 groups, while in other materials the triangular channels are occupied by tetrahedral or pyramidal groups. Holtite and magnesiodumortierite are isostructural with dumortierite, while ellenbergerite, phosphoellenbergerite, ekatite, and the synthetic materials...
Journal Article
Textural and spectroscopic studies on hydrothermal dumortierite from an Al-rich clay deposit, southeastern Korea Available to Purchase
Journal: Mineralogical Magazine
Published: 01 August 2003
Mineralogical Magazine (2003) 67 (4): 799–806.
... grades ( Schreyer et al. , 1975 ; Takahata and Uchiyama, 1985 ; Beukes et al. , 1987 ; Chopin et al. , 1995 ). The dumortierite group consists of two types of minerals, namely, dumortierite and magnesiodumortierite. The transition from dumortierite to Ti-free magnesiodumortierite is favoured...
Image
Unit-cell parameters b versus a (space group Pmcn ) for dumortierite gro... Available to Purchase
in STRUCTURE AND TOPOLOGY OF DUMORTIERITE AND DUMORTIERITE-LIKE MATERIALS
> The Canadian Mineralogist
Published: 01 October 2012
squares, holtite [one unpublished datum, 4 from Groat et al . (2009) , and one each from Pryce (1971) , Hoskins et al . (1989) , Kazantsev et al . (2006) , and Zubkova et al . (2006) ]; the black star represents magnesiodumortierite [from Ferraris et al . [1995) ]; the dashed line is b
Journal Article
MAS NMR measurements and ab initio calculations of the 29 Si chemical shifts in dumortierite and holtite Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2012
American Mineralogist (2012) 97 (2-3): 329–340.
... of the important crystal-chemical substitutions in the dumortierite group minerals occur in the hexagonal channels, for example (Ta 5+ , Nb 5+ ) at Al1 and (As 3+ , Sb 3+ ) at Si1 and Si2 in holtite (see below), (Mg 2+ , Ti 4+ ) at Al1 in magnesiodumortierite, and significant vacancies at Al1 in all three minerals...
Journal Article
Fibrous nanoinclusions in massive rose quartz: HRTEM and AEM investigations Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 2002
American Mineralogist (2002) 87 (2-3): 269–276.
...F igure 8. Octahedral cation contents in the fibers from rose quartz (this study), classic dumortierite ( Alexander et al. 1986 ), and magnesiodumortierite ( Chopin et al. 1995 ). ...
Journal Article
Mineralogy and Origin of Dumortierite from Girola Area, Bhandara District, Eastern Maharashtra Available to Purchase
Publisher: Geological Society of India
Published: 01 February 2012
Jour. Geol. Soc. India (2012) 79 (2): 181–188.
..., 1996 ). The dumortierite group consists of two types of minerals, namely, dumortierite and magnesiodumortierite. The transition from dumortierite to Ti-free magnesiodumortierite is favoured by increasing pressure ( Chopin et al. 1995 ). The ionic potentials of elements such as Fe, Ti and Mn...
Journal Article
Dumortierite from the Gföhl unit, Lower Austria : chemistry, structure, and infra-red spectroscopy Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 January 2005
European Journal of Mineralogy (2005) 17 (1): 173–183.
...% for dumortierite from Weißenkirchen in der Wachau ( Table 3 ). Similar MgO contents have been found in dumortierite samples from the Saxonian Erzgebirge, Germany (Groat et al. , in prep.). Magnesiodumortierite (a “high-pressure mineral”) from the Dora Maira Massif, Western Alps, contains up to ∼ 5.8–8.7 wt% MgO...
Journal Article
The dumortierite supergroup. II. Three new minerals from the Szklary pegmatite, SW Poland: Nioboholtite, (Nb 0.6 □ 0.4 )Al 6 BSi 3 O 18 , titanoholtite, (Ti 0.75 □ 0.25 )Al 6 BSi 3 O 18 , and szklaryite, □Al 6 B BAs 3 3 + O 15 Available to Purchase
Journal: Mineralogical Magazine
Published: 01 August 2013
Mineralogical Magazine (2013) 77 (6): 2841–2856.
... constituting the supergroup: dumortierite, endmember (Al)Al 6 BSi 3 O 18 , magnesiodumortierite, endmember (Mg)Al 6 BSi 3 O 17 (OH), and holtite, endmember (Ta 0.6 □ 0.4 )Al 6 B 3 Si 3 O 18 ( Pieczka et al. , 2013 ). Here we describe three new minerals in the dumortierite supergroup from the Szklary...
Journal Article
Minerals and materials: building principles and applications A special issue in honour of Giovanni Ferraris and Stefano Merlino Free
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 May 2018
European Journal of Mineralogy (2018) 30 (3): 411–412.
.... , Schertl , H.-P. , Chopin , C. ( 2018 ): Synthetic [4] B-bearing dumortierite and natural [4] B-free magnesiodumortierite from the Dora-Maira Massif: Differences in boron coordination in response to ultrahigh pressure . Eur. J. Mineral. , 30 , DOI: 10.1127/ejm/2018/0030-2742...
Journal Article
Ekatite, (Fe 3+ , Fe 2+ , Zn) 12 (OH) 6 [AsO 3 ] 6 [AsO 3 HOSiO 3 ] 2 , a new mineral from Tsumeb, Namibia, and its crystal structure Available to Purchase
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 July 2001
European Journal of Mineralogy (2001) 13 (4): 769–777.
... of the face-sharing octahedra are ordered with one Mg and one Al in each dimer ( Fig. 5b ). The consequence is a change in symmetry from space group P 6 3 mc to P 6 3 . The structure comparison of ellenbergerite with magnesiodumortierite, idealized as (Mg,Ti, □)(Al, □) 4 (Al,Mg,□) 2 (OH) 3 (BO 3 )[(Si...
Image
Unit-cell parameters a versus c for DLMs. Sources for naturally occurring... Available to Purchase
in STRUCTURE AND TOPOLOGY OF DUMORTIERITE AND DUMORTIERITE-LIKE MATERIALS
> The Canadian Mineralogist
Published: 01 October 2012
Fig. 8 Unit-cell parameters a versus c for DLMs. Sources for naturally occurring dumortierite (black circles), synthetic dumortierite (white circles), holtite (black squares), and magnesiodumortierite (black star) are given in the caption to Fig. 5 . Black triangles represent ellenbergerite [2
Journal Article
The Crystal Chemistry of As- and Sb-bearing Dumortierite Available to Purchase
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 August 2012
The Canadian Mineralogist (2012) 50 (4): 855–872.
... in granitic pegmatites compared to tourmaline, dumortierite is a typical mineral of the abyssal class, AB-BBe subclass of pegmatites, which Černý & Ercit (2005) recognized in their revision of the classification of pegmatites. Magnesiodumortierite [ ca. (Mg,Ti,□)Al 4 (Al,Mg) 2 (BO 3 )Si 3 O 12 (OH,O) 3...
Journal Article
Continental Crust at Mantle Depths: Key Minerals and Microstructures Available to Purchase
Journal: Elements
Publisher: Mineralogical Society of America
Published: 01 August 2013
Elements (2013) 9 (4): 261–266.
... is stable at much lower pressures (P > 0.5 GPa) and higher temperatures (T < 1000 °C; Brunet et al. 1998 ). Magnesiodumortierite ( T able 2 )—like ellenbergerite, with chains of face-sharing octahedra—was also described as a new species from the Dora-Maira massif. It forms inclusions in pyrope...
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