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Galaxite

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Nordmark, Filipstad, Värmland, Sweden
© Kjell Gatedal

Show Galaxite Photos (3)
Formula:
(Mn,Fe,Mg)(Al,Fe)
 
2
O
 
4
System:IsometricColour:Red, brown
Hardness:7½
Name:The type locality is near Galax, Alleghany Co., North Carolina, USA.


Spinel Group, Al series.

Classification of Galaxite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/B.01-30
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:7.2.1.2

7 : MULTIPLE OXIDES
2 : AB2X4
Hey's CIM Ref.:7.19.5

7 : Oxides and Hydroxides
19 : Oxides of Mn and Fe
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Type Occurrence of Galaxite

Type Locality:Bald Knob Deposit (Primary Ore Body; Crouse Knob Deposit), Bald Knob, Sparta, Alleghany Co., North Carolina, USA
Year of Discovery:1932

Physical Properties of Galaxite

Lustre:Vitreous
Colour:Red, brown
Streak:Brownish red
Hardness (Mohs):7½
Tenacity:Brittle
Fracture:Conchoidal
Density (calculated):4.03 g/cm3

Crystallography of Galaxite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m (F41/d 3 2/m)
Cell Parameters:a = 8.271Å
Unit Cell Volume:V 565.81 ų (Calculated from Unit Cell)
Morphology:Massive.

Optical Data of Galaxite

Type:Isotropic

Chemical Properties of Galaxite

Formula:
(Mn,Fe,Mg)(Al,Fe)
 
2
O
 
4
Essential elements:Al, Mn, O
All elements listed in formula:Al, Fe, Mg, Mn, O

Relationship of Galaxite to other Species

Related Minerals - Nickel-Strunz Grouping):
4.BB.05Brunogeierite
(Ge,Fe)Fe
 
2
O
 
4
4.BB.05Chromite
FeCr
 
2
O
 
4
4.BB.05Cochromite
(Co,Ni,Fe)(Cr,Al)
 
2
O
 
4
4.BB.05Coulsonite
FeV
 
2
O
 
4
4.BB.05Cuprospinel
Cu
2+
 
Fe
3+
2
O
 
4
4.BB.05Filipstadite
(Mn,Mg)
 
2
(Sb
 
.5
Fe
 
.5
)O
 
4
4.BB.05Franklinite
Zn
2+
 
Fe
3+
2
O
 
4
4.BB.05Gahnite
ZnAl
 
2
O
 
4
4.BB.05Hercynite
FeAl
 
2
O
 
4
4.BB.05Jacobsite
Mn
2+
 
Fe
3+
2
O
 
4
4.BB.05Manganochromite
(Mn,Fe)(Cr,V)
 
2
O
 
4
4.BB.05Magnesiocoulsonite
MgV
 
2
O
 
4
4.BB.05Magnesiochromite
MgCr
 
2
O
 
4
4.BB.05Magnesioferrite
MgFe
3+
2
O
 
4
4.BB.05Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
4.BB.05Nichromite
(Ni,Co,Fe)(Cr,Fe,Al)
 
2
O
 
4
4.BB.05Qandilite
(Mg,Fe)
 
2
(Ti,Fe,Al)O
 
4
4.BB.05Spinel
MgAl
 
2
O
 
4
4.BB.05Trevorite
Ni
2+
 
Fe
3+
2
O
 
4
4.BB.05Ulvöspinel
Fe
 
2
TiO
 
4
4.BB.05Vuorelainenite
(Mn,Fe)(V,Cr)
 
2
O
 
4
4.BB.05Zincochromite
ZnCr
 
2
O
 
4
4.BB.05Tegengrenite
(Mg,Mn
2+
 
)
 
2
Sb
5+
0.5
(Mn
3+
 
,Si,Ti)
 
0.5
O
 
4
4.BB.10Hausmannite
MnMn
 
2
O
 
4
4.BB.10Hetaerolite
ZnMn
 
2
O
 
4
4.BB.10Hydrohetaerolite
ZnMn
 
2
O
 
4
·H
 
2
O
4.BB.10Iwakiite
Mn(Fe,Mn)
 
2
O
 
4
4.BB.15Maghemite
Fe
 
2
O
 
3
4.BB.15Titanomaghemite
Fe
3+
 
(Fe
3+
 
,Ti
4+
 
,Fe
2+
 
,[])
 
2
O
 
4
Related Minerals - Hey's Index Grouping:
7.19.1Bixbyite
(Mn
3+
 
,Fe
3+
 
)
 
2
O
 
3
7.19.2Janggunite
Mn
 
5-x
(Mn,Fe)
 
1+x
O
 
8
(OH)
 
6
7.19.3Jacobsite
Mn
2+
 
Fe
3+
2
O
 
4
7.19.4Vernadite
(Mn
4+
 
,Fe
3+
 
,Ca,Na)(O,OH)
 
2
 · nH
 
2
O
7.19.6Filipstadite
(Mn,Mg)
 
2
(Sb
 
.5
Fe
 
.5
)O
 
4
7.19.7Manganochromite
(Mn,Fe)(Cr,V)
 
2
O
 
4
7.19.8Zenzénite
Pb
 
3
(Fe,Mn)
 
4
Mn
 
3
O
 
13

Other Names for Galaxite

Synonyms:
Manganspinel
German names:
Galaxit
Russian names:
Галаксит
Spanish names:
Galaxita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Galaxite

Reference List:Krenner (1907), Zs. Kr.: 43: 471.

Ross and Kerr (1932), American Mineralogist (1932): 17: 1-8, 15.

Essene, E.J. and Peacor, D.R. (1983) Crystal chemistry and petrology of coexisting galaxite and jacobsite and other spinel solutions and solvi. American Mineralogist: 68: 449-455.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 689-697.

European Journal of Mineralogy: 9: 31-42.

Internet Links for Galaxite

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  • Raman and XRD data at RRUFF project
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    Localities for Galaxite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Bavaria
      • Franconia
        • Maroldsweisach
    		Wittern: "Mineralfundorte in Deutschland", 2001
    Ghana
     
    • Western Province
      • Tarkwa
    		Mineralium Deposita Volume 34 Issue 3 (1999) pp 297-311
    Japan
     
    • Honshu Island
      • Chubu Region
        • Aichi Prefecture
          • Kita-Shidara-gun
            • Shidara
    		Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.; Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
        • Gifu Prefecture
    		Donald E. Lee (1955)
      • Chugoku Region
        • Yamaguchi Prefecture
    		H. Momoi (1964) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 15, #1, 61.
          • Kudamatsu City
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    Mayumi Yoshinaga (1963) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 14, 1, 1-22.
    Lee, D. E. (1955)
    Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
      • Kanto Region
        • Gunma Prefecture
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
        • Tochigi Prefecture
          • Kanuma
    Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    H. Yoshimura (1952)
      • Kinki Region
        • Kyoto Prefecture
          • Sohraku-gun
        • Shiga Prefecture
    		No reference listed
      • Tohoku Region
        • Iwate Prefecture
    Dr. Matsuo Nambu ore collection (curated at Geological Survey of Japan)
    Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    • Kyushu Island
      • Miyazaki Prefecture
    		Fukuoka, M. (1981) Memoirs of the Faculty of Science, Kyushu University, Series D, Geology, 24, #4, 207-252.
    Namibia
     
    • Otjozondjupa Region
      • Grootfontein District
        • Kombat
    		Mineralogical Record: 22: 421.
    Russia
     
    World of Stones #10.
    Sweden
     
    • Värmland
      • Filipstad
    		Kjell Gatedal
        • Nordmark
    		Min.Mag.(1978) 42, 133-136
    Kjell Gatedal
    Switzerland
     
    • Wallis (Valais)
      • Turtmann Valley
    		The Canadian Mineralogist Vol. 44, pp. 000 (2006) page 205
      • Zermatt - Saas Fee area
        • Matter Valley
          • Täsch Valley
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 30-31
    Thailand
     
    • Kanchanaburi Province
    United Arab Emirates
     
    • Fujayrah (Fujairah) Emirate
      • Semail Ophiolite
    		Gnos, E. and Peters, T. (1995) Tephroite-hausmannite-galaxite from a granulite-facies manganese rock of the United Arab Emirates. Contributions to Mineralogy and Petrology: 120: 372-377.
    USA
     
    • North Carolina
      • Alleghany Co.
        • Sparta
          • Bald Knob
    		Rocks & Min.: 60:130-135.
      • Clay Co.
    		Forsyth Gem and Mineral Club
    • Virginia
      • Carroll Co.
        • Southern Section-Blue Ridge Province
          • Gossan Lead District
    		Minerals of Virginia 1990 by R. V. Dietrich
      • Pittsylvania Co.
        • James River-Roanoke River Mn-Fe-Ba District
    		AmMin 87:690-698 (2002)
    Minerals of Virginia, 1990 by R. V. Dietrich
    Mineral and/or Locality
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