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![Local IVMn2+-O distances for the spinel-galaxite binary as calculated from optical absorption spectra (filled squares) compared to average T-O distances for the fully ordered spinel-galaxite binary and the ideal IVMg2+-O and IVMn2+-O bond lengths of spinel and galaxite, respectively (Lavina et al. 2002 and this work).]()
![Optical absorption spectra of manganese-doped gahnites Ghn-12, Ghn-13, and Ghn-14. The color of synthetic galaxite, Mn2+Al2O4, with a thickness of 0.5 mm was calculated by digitalizing the spectrum in Hålenius et al. (2007). They state that the color of their galaxite with a thickness of 0.103 mm is yellow. (Color online.)]()
![Optical absorption spectrum of Mn-bearing gahnite (black solid line) compared with the spectrum of a synthetic end-member galaxite [dark gray solid line; from Hålenius et al. (2007)]. The IVMn2+ content in the galaxite sample is 0.84 apfu (Hålenius et al. 2011), but is only 0.08 apfu in the present gahnite. Corresponding absorption bands in the two spectra are connected by gray straight lines.]()
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![Scanning electron microscope images of spessartine- and galaxite-bearing rocks from Pipji. (a) Spessartine porphyroblast with fluorapatite inclusions in coarser-grained apatite-bearing schist. Pigl.6, back-scattered-electron (BSE) image, 10 kV. (b) Detailed view of the central region of spessartine crystal in (a). Pigl.6, BSE, 10 kV. (c) Galaxite-bearing paragenesis. Pigl.5, BSE, 20 kV. The symbols are defined in Table 1.]()
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1-20 OF 133 RESULTS FOR
galaxite
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Journal Article
Galaxite, MnAl 2 O 4 , a spectroscopic standard for tetrahedrally coordinated Mn 2+ in oxygen-based mineral structures Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2007
American Mineralogist (2007) 92 (7): 1225–1231.
...Ulf Hålenius; Ferdinando Bosi; Henrik Skogby Abstract Chemical analyses, crystal structure refinement, cation order determination, and single-crystal optical absorption spectrum of synthetic galaxite are presented. New optical absorption spectra of natural Mn-bearing willemite, rhodochrosite, Mn...
FIGURES
| View All (6)
Journal Article
Spinels and other oxides in Mn-rich rocks from the Hutter Mine, Pittsylvania County, Virginia, U.S.A.: Implications for miscibility and solvus relations among jacobsite, galaxite, and magnetite Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 May 2002
American Mineralogist (2002) 87 (5-6): 690–698.
... oxides and spinels at the Hutter Mine include manganosite (MnO) (coexisting with hausmannite and jacobsite) as well as spinels rich in jacobsite (FeMn 2 O 4 ), magnetite (Fe 3 O 4 ), and galaxite (MnAl 2 O 4 ), and a variety of intermediate solid solutions between these three end-members. Several samples...
FIGURES
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Journal Article
Crystal chemistry and petrology of coexisting galaxite and jacobsite and other spinel solutions and solvi Available to Purchase
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 1983
American Mineralogist (1983) 68 (3-4): 449–455.
...E. J. Essene; D. R. Peacor Abstract Galaxite ( Gx :MnAl 2 O 4 ) and jacobsite ( Jb :MnFe 2 O 4 )-rich spinels occur together in the metamorphosed manganese deposit near Bald Knob, North Carolina. They show limited mutual solubility with 12-19% Jb in Gx and 19-22% Gx in Jb . The implied solvus...
Image
Local IV Mn 2+ -O distances for the spinel-galaxite binary as calculated f... Available to Purchase
in A first record of strong structural relaxation of TO 4 tetrahedra in a spinel solid solution
> American Mineralogist
Published: 01 April 2011
F igure 4. Local IV Mn 2+ -O distances for the spinel-galaxite binary as calculated from optical absorption spectra (filled squares) compared to average T-O distances for the fully ordered spinel-galaxite binary and the ideal IV Mg 2+ -O and IV Mn 2+ -O bond lengths of spinel and galaxite
Image
Optical absorption spectra of manganese-doped gahnites Ghn-12, Ghn-13, and ... Available to Purchase
in An UV/Vis/NIR optical absorption spectroscopic and color investigation of transition-metal-doped gahnite (ZnAl 2 O 4 spinel) crystals grown by the flux method
> American Mineralogist
Published: 02 January 2024
Figure 6. Optical absorption spectra of manganese-doped gahnites Ghn-12, Ghn-13, and Ghn-14. The color of synthetic galaxite, Mn 2+ Al 2 O 4 , with a thickness of 0.5 mm was calculated by digitalizing the spectrum in Hålenius et al. (2007) . They state that the color of their galaxite
Image
![Optical absorption spectrum of Mn-bearing gahnite (black solid line) compared with the spectrum of a synthetic end-member galaxite [dark gray solid line; from Hålenius et al. (2007)]. The IVMn2+ content in the galaxite sample is 0.84 apfu (Hålenius et al. 2011), but is only 0.08 apfu in the present gahnite. Corresponding absorption bands in the two spectra are connected by gray straight lines.](https://gsw.silverchair-cdn.com/gsw/Content_public/Journal/ammin/99/2-3/10.2138_am.2014.4670/3/s_0261f2.jpeg?Expires=2147483647&Signature=z-s-1sM04u9Hm9yjjTQ7IhXcUorzRRvGT5P3gbSQe39VDs2bIMY4orZbklFgeC6jWkTy3YhMb6VhJ7Pfitje3QlvBQ-TL~aUJfSupnrOnBj8gRDb91eCXl8~NcAyX48TkrzXVcpZouHiLR0dcQn26QbfxmaGSNFxfh5KkRwUnr7FIlRZrAlsAuoRdwmIccFx53rrHTBgATnftBmalMLmgcC736sDXnjz-ye~cRLSBXz9bbSryn36mUbrAcsmGs0Jb7Q3wrPaO4-WYLfSXY~WdK8m6h5JaNz5-JJSti8YOUsmG2m1WIi2MsFgwGekSn1JDqv3zvcCNYe0Qlls0wGWOw__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Optical absorption spectrum of Mn-bearing gahnite (black solid line) compar... Available to Purchase
in Color of Mn-bearing gahnite: A first example of electronic transitions in heterovalent exchange coupled IV Mn 2+ – VI Mn 3+ pairs in minerals
> American Mineralogist
Published: 01 February 2014
Figure 2 Optical absorption spectrum of Mn-bearing gahnite (black solid line) compared with the spectrum of a synthetic end-member galaxite [dark gray solid line; from Hålenius et al. (2007) ]. The IV Mn 2+ content in the galaxite sample is 0.84 apfu ( Hålenius et al. 2011 ), but is only 0.08
Image
F ig . 5. Photomicrographs of typical manganese ores from the Noda-T... Available to Purchase
in OXYGEN ISOTOPE STUDY OF METAMORPHOSED MANGANESE DEPOSITS OF
THE NODA-TAMAGAWA MINE, NORTHEAST JAPAN
> Economic Geology
Published: 01 January 2003
F ig . 5. Photomicrographs of typical manganese ores from
the Noda-Tamagawa mine. A. Rhodonite ore. B. Tephroite ore with galaxite.
C. Tephroite ore with rhodochrosite. D. Hausmannite ore. All photos are
under transmitted light, and photos C and D are under crossed nicols
Image
Scanning electron microscope images of spessartine- and galaxite-bearing ro... Available to Purchase
in MANGANESE-RICH ASSEMBLAGES IN THE BARRHORN UNIT, TURTMANNTAL, CENTRAL ALPS, SWITZERLAND
> The Canadian Mineralogist
Published: 01 February 2006
F ig . 5. Scanning electron microscope images of spessartine- and galaxite-bearing rocks from Pipji. (a) Spessartine porphyroblast with fluorapatite inclusions in coarser-grained apatite-bearing schist. Pigl.6, back-scattered-electron (BSE) image, 10 kV. (b) Detailed view of the central region
Image
Averaged compositions and element totals of jacobsite and galaxite samples ... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 2: Averaged compositions and element totals of jacobsite and galaxite samples determined by electron microprobe. 1 Al Mn Fe O Total 2 Formula based on 4 Oxygen Est. Mn valence GaAC 15.57(71) 51.86(96) bd 32.83(38) 100.29(37) Mn 1.84 Al 1.12 O 4 2.52 Ga93
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
Mn K -edge pre-peak data for galaxite and jacobsite samples and Fe K -edg... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 4: Mn K -edge pre-peak data for galaxite and jacobsite samples and Fe K -edge data from jacobsite spectra. Mn K -edge Fe K -edge Sample % M Centroid (eV) Area Centroid (eV) Area Est. average valence GaAC 52 6539.04 0.089 Ga93 52 6539.04 0.092
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
Image
SC-XRD refinements for galaxite-group data, and refinement which includes c... Open Access
in Cation distribution and valence in synthetic Al–Mn–O and Fe–Mn–O spinels under varying $f_{{\rm O}_{\rm 2}}$ conditions
> Mineralogical Magazine
Published: 15 May 2018
Table 3: SC-XRD refinements for galaxite-group data, and refinement which includes cation distribution based on modelling of bond lengths. Group Crystal formula based on the structure refinement, with site distributions General formula based on the structure refinement Electron
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