Galaxite
A valid IMA mineral species - grandfathered
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About Galaxite
Formula:
Mn2+Al2O4
Colour:
Black, red, brown
Lustre:
Vitreous
Hardness:
7½
Specific Gravity:
4.03 (Calculated)
Crystal System:
Isometric
Member of:
Name:
The type locality (Bald Knob deposit, Alleghany Co., North Carolina, USA) is near Galax (Virginia). The mineral has been named for Galax and for the plant galax urceolata, after which the town is named.
This page provides mineralogical data about Galaxite.
Unique Identifiers
Mindat ID:
1639
Long-form identifier:
mindat:1:1:1639:7
GUID
(UUID V4):
(UUID V4):
d7875f4e-dbde-46f9-a848-729db0228abc
IMA Classification of Galaxite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1932
Classification of Galaxite
4.BB.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
7.2.1.2
7 : MULTIPLE OXIDES
2 : AB2X4
7 : MULTIPLE OXIDES
2 : AB2X4
7.19.5
7 : Oxides and Hydroxides
19 : Oxides of Mn and Fe
7 : Oxides and Hydroxides
19 : Oxides of Mn and Fe
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Glx | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Galaxite
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Physical Properties of Galaxite
Vitreous
Colour:
Black, red, brown
Streak:
Brownish red
Hardness:
7½ on Mohs scale
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
4.03 g/cm3 (Calculated)
Optical Data of Galaxite
Chemistry of Galaxite
Mindat Formula:
Mn2+Al2O4
Elements listed:
Crystallography of Galaxite
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 8.271 Å
Unit Cell V:
565.81 ų (Calculated from Unit Cell)
Morphology:
Massive.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0000895 | Galaxite | Essene E J, Peacor D R (1983) Crystal chemistry and petrology of coexisting galaxite and jacobsite and other spinel solution and solvi American Mineralogist 68 449-455 | 1983 | 0 | 293 | ||
0006642 | Galaxite | Lucchesi S, Russo U, Della Giusta A (1997) Crystal chemistry and cation distribution in some Mn-rich natural and synthetic spinels European Journal of Mineralogy 9 31-42 | 1997 | 0 | 293 |
CIF Raw Data - click here to close
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
31 : Thermally altered carbonate, phosphate, and iron formations | |
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
Stage 5: Initiation of plate tectonics | <3.5-2.5 |
39 : High-𝑃 metamorphism (blueschist, eclogite, ultrahigh 𝑃 facies) | |
40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Galaxite
General Appearance of Type Material:
Black, rounded to euhedral grains averaging 0.2 millimeters in diameter.
Place of Conservation of Type Material:
No designated type material.
Associated Minerals at Type Locality:
Reference:
Ross, C.S., Kerr, P.F. (1932) The manganese minerals of a vein near Bald Knob, North Carolina. American Mineralogist: 17: 1-18.
Synonyms of Galaxite
Other Language Names for Galaxite
Relationship of Galaxite to other Species
Member of:
Other Members of this group:
Chromite | Fe2+Cr3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Cochromite | CoCr2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Coulsonite | Fe2+V3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Cuprospinel | Cu2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) |
Dellagiustaite | V2+Al2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Deltalumite | (Al0.67◻0.33)Al2O4 | Tet. 4 2m : P4m2 |
Franklinite | Zn2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Gahnite | ZnAl2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Guite | Co2+Co3+2O4 | Iso. |
Hausmannite | Mn2+Mn3+2O4 | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
Hercynite | Fe2+Al2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Hetaerolite | ZnMn2O4 | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
Jacobsite | Mn2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Jacobsite-Q | Mn2+(Fe3+,Mn3+)2O4 | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
Maghemite | (Fe3+0.67◻0.33)Fe3+2O4 | Iso. 4 3 2 : P41 3 2 |
Magnesiochromite | MgCr2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Magnesiocoulsonite | MgV2O4 | Iso. m3m (4/m 3 2/m) |
Magnesioferrite | MgFe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Magnetite | Fe2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Manganochromite | Mn2+Cr2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Nichromite | (Ni,Co,Fe)(Cr,Fe,Al)2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Spinel | MgAl2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Thermaerogenite | CuAl2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Titanomaghemite | (Ti4+0.5◻0.5)Fe3+2O4 | Iso. 4 3 2 : P43 3 2 |
Trevorite | Ni2+Fe3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
UM1994-06-O:AlCo | CoAl2O4 | |
Vuorelainenite | Mn2+V3+2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Zincochromite | ZnCr2O4 | Iso. m3m (4/m 3 2/m) : Fd3m |
Common Associates
Associated Minerals Based on Photo Data:
5 photos of Galaxite associated with Jacobsite | Mn2+Fe3+2O4 |
4 photos of Galaxite associated with Wiserite | (Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl |
1 photo of Galaxite associated with Kutnohorite | CaMn2+(CO3)2 |
1 photo of Galaxite associated with Clino-suenoite | ◻{Mn2+2}{Mg5}(Si8O22)(OH)2 |
1 photo of Galaxite associated with Kellyite | Mn2+2Al(AlSiO5)(OH)4 |
1 photo of Galaxite associated with Alleghanyite | Mn2+5(SiO4)2(OH)2 |
1 photo of Galaxite associated with Sarkinite | Mn2+2(AsO4)(OH) |
1 photo of Galaxite associated with Calcite | CaCO3 |
1 photo of Galaxite associated with Manganosite | MnO |
1 photo of Galaxite associated with Pyrochroite | Mn(OH)2 |
Related Minerals - Strunz-mindat Grouping
4.BB. | Elgoresyite | (Mg5Si2)O9 |
4.BB. | Chenmingite | FeCr2O4 |
4.BB. | Dellagiustaite | V2+Al2O4 |
4.BB. | Thermaerogenite | CuAl2O4 |
4.BB. | Chukochenite | LiAl5O8 |
4.BB. | Garpenbergite | Mn6◻AsSbO10(OH)2 |
4.BB. | Magnéliite | Ti3+2Ti4+2O7 |
4.BB. | Jianmuite | ZrTi4+Ti3+5Al3O16 |
4.BB.05 | Chromite | Fe2+Cr3+2O4 |
4.BB.05 | Cochromite | CoCr2O4 |
4.BB.05 | Coulsonite | Fe2+V3+2O4 |
4.BB.05 | Cuprospinel | Cu2+Fe3+2O4 |
4.BB.05 | Filipstadite | (Fe3+0.5Sb5+0.5)Mn2O4 |
4.BB.05 | Franklinite | Zn2+Fe3+2O4 |
4.BB.05 | Gahnite | ZnAl2O4 |
4.BB.05 | Hercynite | Fe2+Al2O4 |
4.BB.05 | Jacobsite | Mn2+Fe3+2O4 |
4.BB.05 | Manganochromite | Mn2+Cr2O4 |
4.BB.05 | Magnesiocoulsonite | MgV2O4 |
4.BB.05 | Magnesiochromite | MgCr2O4 |
4.BB.05 | Magnesioferrite | MgFe3+2O4 |
4.BB.05 | Magnetite | Fe2+Fe3+2O4 |
4.BB.05 | Nichromite | (Ni,Co,Fe)(Cr,Fe,Al)2O4 |
4.BB.05 | Qandilite | (Mg,Fe3+)2(Ti,Fe3+,Al)O4 |
4.BB.05 | Spinel | MgAl2O4 |
4.BB.05 | Trevorite | Ni2+Fe3+2O4 |
4.BB.05 | Ulvöspinel | TiFe2+2O4 |
4.BB.05 | Vuorelainenite | Mn2+V3+2O4 |
4.BB.05 | Zincochromite | ZnCr2O4 |
4.BB.05 | Harmunite | CaFe2O4 |
4.BB.05 | Wernerkrauseite | Ca(Fe3+,Mn3+)2Mn4+O6 |
4.BB.05 | Deltalumite | (Al0.67◻0.33)Al2O4 |
4.BB.05 | Guite | Co2+Co3+2O4 |
4.BB.10 | Hausmannite | Mn2+Mn3+2O4 |
4.BB.10 | Hetaerolite | ZnMn2O4 |
4.BB.10 | Manganostibite | (Mn,Fe)7SbAsO12 |
4.BB.15 | Maghemite | (Fe3+0.67◻0.33)Fe3+2O4 |
4.BB.15 | Titanomaghemite | (Ti4+0.5◻0.5)Fe3+2O4 |
4.BB.20 | Tegengrenite | (Mn3+0.5Sb5+0.5)Mg2O4 |
4.BB.25 | Xieite | Fe2+Cr2O4 |
4.BB.30 | Carmeltazite | ZrAl2Ti4O11 |
4.BB.35 | Feiite | Fe2+2(Fe2+Ti4+)O5 |
4.BB.40 | Maohokite | MgFe2O4 |
4.BB.45 | Tschaunerite | (Fe2+)(Fe2+Ti4+)O4 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Galaxite in petrology
An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.
Internet Links for Galaxite
mindat.org URL:
https://www.mindat.org/min-1639.html
Please feel free to link to this page.
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References for Galaxite
Reference List:
Ross, Clarence S., Kerr, Paul F. (1932) The manganese minerals of a vein near Bald Knob, North Carolina. American Mineralogist, 17 (1) 1-18
Beard, James S., Tracy, Robert J. (2002) 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. American Mineralogist, 87 (5) 690-698 doi:10.2138/am-2002-5-611
Localities for Galaxite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Austria | |
| Kolitsch et al. (2021) |
| Kolitsch et al. (2017) |
France | |
| Chopin (1978) |
| Chopin (1978) |
Germany | |
| Wittern (2001) |
Ghana | |
| Mineralium Deposita Volume 34 Issue 3 (1999) |
Japan | |
| Mayumi Yoshinaga (1963) +2 other references |
| 加藤昭 (1980) +1 other reference |
| Donald E. Lee (1955) |
| FUKUOKA et al. (1977) +1 other reference |
| FUKUOKA et al. (1977) |
FUKUOKA et al. (1977) +1 other reference | |
FUKUOKA et al. (1977) +2 other references | |
| Kobayashi H (1977) +1 other reference |
| Fukuoka (1981) |
| Katsu Kaneko (1956) +1 other reference |
| Dr. Matsuo Nambu ore collection (curated at Geological Survey of Japan) |
| Ohe Rikosha specimens (with sonolite) |
| Fukuoka (1981) |
| Fuzimoto (2006) |
| Katsu Kaneko (1956) +2 other references |
| 加藤昭 (1980) |
| Akira Kato (undated manuscript) +2 other references |
Fukuoka (1981) | |
H. Yoshimura (1952) | |
| Lee (1955) |
| Fumitoshi HIROWATARI (1961) +2 other references |
| H. Momoi (1964) |
Mayumi Yoshinaga (1963) | |
Fukuoka (1981) | |
Namibia | |
| Dunn (1991) |
Romania | |
| Hirtopanu et al. (2015) |
| minerals-of-the-carpathians.eu (2008) |
| Hîrtopanu (1997) +1 other reference |
Russia | |
| Brusnitsyn (2000) |
| Brusnitsyn A.I. (2000) |
World of Stones #10. | |
Sweden | |
| Kjell Gatedal collection and ... |
| Kjell Gatedal collection and ... +1 other reference |
Kjell Gatedal collection and ... +1 other reference | |
Moore (1978) | |
Knut Edvard Larsen collection (Ex Harald Folvik collection) | |
Switzerland | |
| Stalder et al. (1998) |
| Stalder et al. (1998) |
| The Canadian Mineralogist Vol. 44 (2006) +1 other reference |
| Stalder et al. (1998) |
Thailand | |
| RRUFF Specimen ID: R120116 |
United Arab Emirates | |
| Gnos et al. (1995) |
USA | |
| Schooner (circa 1980s) |
| Ross et al. (1932) +1 other reference |
| Forsyth Gem and Mineral Club |
| Dietrich (1990) |
| Beard et al. (2002) |
Dietrich (1990) |
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Nordmark Odal Field, Filipstad, Värmland County, Sweden