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magnesiohulsite

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Journal Article
Published: 01 January 2004
European Journal of Mineralogy (2004) 16 (1): 151–161.
...Nikolai N. PERTSEV; Werner SCHREYER; Thomas ARMBRUSTER; Heinz-Jörgen BERNHARDT; Olaf MEDENBACH Abstract Alumino-magnesiohulsite, the Al- and Mg-dominant analogue of hulsite, (Fe 2+ ,Mg) 2 (Fe 3+ ,Sn, Mg)O 2 BO 3 , is a new, optically spectacular mineral with pleochroism from brown to blue-green...
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Atomic positional parameters and isotropic displacement parameters for alum...
Published: 01 January 2004
Table 3. Atomic positional parameters and isotropic displacement parameters for alumino-magnesiohulsite.
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Electron microprobe analyses of alumino-<span class="search-highlight">magnesiohulsite</span> (1–4) and ludwigite...
Published: 01 January 2004
Table 1. Electron microprobe analyses of alumino-magnesiohulsite (1–4) and ludwigite (5–6) from sample B 1048.
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Selected bond distances (Å) for alumino-<span class="search-highlight">magnesiohulsite</span> compared to litera...
Published: 01 January 2004
Table 4 Selected bond distances (Å) for alumino-magnesiohulsite compared to literature data on hulsite. In addition, the assumed (refined) cation occupancy is given for each M site.
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Sketch of hypothetical phase relations involving potential miscibility betw...
Published: 01 January 2004
Fig. 6. Sketch of hypothetical phase relations involving potential miscibility between alumino-magnesiohulsite and ludwigite. For simplification, only Mg, A1,Sn-borate formulae are considered. The ordinate is a reversed time axis indicating that a homogeneous borate phase may, under different
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Thin section photograph of a bimineralic aggregate consisting of needles of...
Published: 01 January 2004
Fig. 1. Thin section photograph of a bimineralic aggregate consisting of needles of opaque ludwigite and two prisms of translucent alu-mino-magnesiohulsite lying in a matrix of mainly calcite. Note rhombic outline of aggregate (pseudomorph?). Plane polarized light. (Long edge of figure equals
Journal Article
Published: 01 October 2004
American Mineralogist (2004) 89 (10): 1574–1578.
.... Pertsev, W. Schreyer, T. Armbruster, H.-J. Bernhardt, O. Medenbach (2004) Alumino-magnesiohulsite, a new member of the hulsite group, in kotoite marble from east of Verkhoyansk, Sakha-Yakutia, Russia. Eur. J. Mineral., 16, 151–161. The mineral forms euhedral to subhedral prisms up to 90 μm long...
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Ternary plot of elements (Mg+Fe tot ) — Al — Sn present in the tin-bearing ...
Published: 01 January 2004
Fig. 2. Ternary plot of elements (Mg+Fe tot ) — Al — Sn present in the tin-bearing unit of selected hulsite-group minerals. For the new mineral alumino-magnesiohulsite described in this paper two compositions are plotted: 1) as calculated from chemical data to be present in stoichiometric unit M
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Reciprocal space drawing of the observed twinning in alumino-<span class="search-highlight">magnesiohulsit</span>...
Published: 01 January 2004
Fig. 4. Reciprocal space drawing of the observed twinning in alumino-magnesiohulsite. The reciprocal lattice of the dominant twin component is represented by solid lines whereas the reciprocal lattice of the minor twin component has dashed lines. The two twin individuals have b * and [101
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Polyhedral representation with unit cell outlines of the structure of alumi...
Published: 01 January 2004
Fig. 5. Polyhedral representation with unit cell outlines of the structure of alumino-magnesiohulsite projected approximately along b . Labeling of octahedra conforms to Konnert et al. (1976) . Mixed-valence octahedra are dark, and octahedra occupied by divalent cations (M4 and M5) are light
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Ternary plot of Mg — Fe tot  — Al present in all structural sites, or in th...
Published: 01 January 2004
Fig. 3. Ternary plot of Mg — Fe tot — Al present in all structural sites, or in the chemical bulk analyses, of selected minerals of the hulsite group. The new mineral alumino-magnesiohulsite is abbreviated here as AlMg-hulsite. Its point represents the composition listed in Table 1 , Mean 1–4
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Mg, Fe-rich portion of the oxide system (Mg, Fe)O - A1 2 O 3  - B 2 O 3  pr...
Published: 01 January 2004
. The compositions denoted by “this paper” represent the new mineral alumino-magnesiohulsite (A1Mg-hulsite) and its coexisting ludwigite of the thin section studied and analyzed ( Table 1 ).
Journal Article
Published: 01 November 2003
European Journal of Mineralogy (2003) 15 (6): 1007–1018.
... fugacity but widely varying temperatures (from 800° C to several tens of degrees only). Only the one thin section (no. B-1048) was available for our study, because the original sample could no longer be located. In addition to the new mineral of the hulsite group, alumino-magnesiohulsite (Pertsev et...
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Journal Article
Published: 01 October 2008
European Journal of Mineralogy (2008) 20 (5): 951–964.
... ( Schreyer et al ., 1998 ), when systematically searching natural environments with similar conditions to their experiments. Pertsevite, however, was accidentally identified by Werner Schreyer during microprobe analyses of another new mineral, alumino-magnesiohulsite, in a kotoite marble from East...
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Journal Article
Published: 01 August 2017
American Mineralogist (2017) 102 (8): 1573–1587.
..., in both cases using the finite Zipf-Mandelbrot model (see below). The localities for solid solutions other than tourmaline-group minerals, that is, hulsite-magnesiohulsite, warwickite-yuanfuliite, fluoborite-hydroxylborite, and kornerupine-prismatine, are under-counted since reports without...
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Journal Article
Published: 01 January 2016
The Canadian Mineralogist (2016) 54 (1): 125–143.
...–magnesiohulsite and fluoborite–hydroxylborite, to complex multicomponent harkerite–sakhaite, axinite group, and tourmaline supergroup minerals, as well as rare earth element-bearing minerals such as tritomite-(Ce)–tritomite-(Y). Supplementary Tables 2 and 3 only include cases for which the chemical data were...
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Journal Article
Published: 01 December 2004
The Canadian Mineralogist (2004) 42 (6): 1901–1928.
... . Relationship to other species : It is a member of the hulsite group. Name : Reflects the composition and relationship to hulsite. Comments : IMA No. 2002–038. P ertsev , N.N., S chreyer , W., A rmbruster , T., B ernhardt , H.-J. & M edenbach , O. ( 2004 ): Alumino-magnesiohulsite, a new...
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