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Tantalite-(Mg)

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Formula:
MgTa2O6
System:
Orthorhombic
Colour:
black
Lustre:
Metallic
Hardness:
Member of:
Name:
For its relation to ferrotantalite and magnesium being the dominant cation
Formerly known as magnesiotantalite.


Classification of Tantalite-(Mg)

Approved
Approval Year:
2002
4.DB.35

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra

Physical Properties of Tantalite-(Mg)

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
black
Streak:
brownish red
Hardness (Mohs):
Tenacity:
Brittle
Density:
6.73 g/cm3 (Measured)    

Chemical Properties of Tantalite-(Mg)

IMA Formula:
MgTa2O6
Elements listed in formula:

Crystallography of Tantalite-(Mg)

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 14.33Å, b = 5.735Å, c = 5.058Å
Ratio:
a:b:c = 2.499 : 1 : 0.882
Unit Cell Volume:
V 415.68 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.67 (60)
2.96 (100)
1.73 (70)
1.46 (90)

Type Occurrence of Tantalite-(Mg)

General Appearance of Type Material:
Alteration zones to a maximum thickness of about 0.5 mm formed between manganotantalite crystals and the host rock
Geological Setting of Type Material:
Andesite-calcite lenses in a zoned, metasomatically altered pegmatite vein hosted by serpentinite

Relationship of Tantalite-(Mg) to other Species

Member of:
Other Members of Group:
Columbite-(Fe)FeNb2O6
Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6
Columbite-(Mn)(Mn,Fe)(Nb,Ta)2O6
Qitianlingite(Fe,Mn)2(Nb,Ta)2WO10
Tantalite-(Fe)FeTa2O6
Tantalite-(Mn)MnTa2O6
4.DB.05ArgutiteGeO2
4.DB.05CassiteriteSnO2
4.DB.05PlattneritePbO2
4.DB.05PyrolusiteMnO2
4.DB.05RutileTiO2
4.DB.05TripuhyiteFe3+Sb5+O4
4.DB.05TugarinoviteMoO2
4.DB.05Varlamoffite(Sn,Fe)(O,OH)2
4.DB.10ByströmiteMgSb25+O6
4.DB.10Tapiolite-(Fe)Fe2+Ta2O6
4.DB.10Tapiolite-(Mn)Mn2+Ta2O6
4.DB.10OrdoñeziteZnSb25+O6
4.DB.15bAkhtenskiteMnO2
4.DB.15cNsutiteMnx2+Mn4+1-xO2-2x(OH)2x
4.DB.15aParamontroseiteVO2
4.DB.15aRamsdelliteMn4+O2
4.DB.20ScrutinyitePbO2
4.DB.25Ishikawaite(U,Fe,Y)NbO4
4.DB.25Ixiolite(Ta,Mn,Nb)O2
4.DB.25Samarskite-(Y)(Y,Ce,U,Fe,Nb)(Nb,Ta,Ti)O4
4.DB.25SrilankiteTi2ZrO6
4.DB.25Yttrocolumbite-(Y)(Y,U,Fe2+)(Nb,Ta)O4
4.DB.25Calciosamarskite(Ca,Fe,Y)(Nb,Ta,Ti)O4
4.DB.25Samarskite-(Yb)YbNbO4
4.DB.30FerberiteFe2+WO4
4.DB.30HübneriteMn2+WO4
4.DB.30SanmartiniteZnWO4
4.DB.30KrasnoselskiteCoWO4
4.DB.30HeftetjerniteScTaO4
4.DB.30HuanzalaiteMgWO4
4.DB.35Columbite-(Fe)Fe2+Nb2O6
4.DB.35Tantalite-(Fe)Fe2+Ta2O6
4.DB.35Columbite-(Mn)Mn2+Nb2O6
4.DB.35Tantalite-(Mn)Mn2+Ta2O6
4.DB.35Columbite-(Mg)MgNb2O6
4.DB.35QitianlingiteFe22+Nb2W6+O10
4.DB.35Magnocolumbite(Mg,Fe,Mn)(Nb,Ta)2O6
4.DB.40FerrowodginiteFe2+Sn4+Ta2O8
4.DB.40LithiotantiteLiTa3O8
4.DB.40LithiowodginiteLiTa3O8
4.DB.40TitanowodginiteMn2+TiTa2O8
4.DB.40WodginiteMn2+Sn4+Ta2O8
4.DB.40FerrotitanowodginiteFe2+TiTa2O8
4.DB.40WolframowodginiteMn(Mn,Sn,Fe,Ta)(W,Ta,Nb)2O8
4.DB.45TivaniteTiV3+O3(OH)
4.DB.50Carmichaelite(Ti,Cr,Fe)(O,OH)2
4.DB.55AlumotantiteAlTaO4
4.DB.60BiehliteSb23+MoO6

Other Names for Tantalite-(Mg)

Name in Other Languages:
Simplified Chinese:镁铌钽矿
Traditional Chinese:鎂鈮鉭礦

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.

References for Tantalite-(Mg)

Reference List:
Pekov, I.V., et al. (2003): Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 132(2): 49-59 (in Russian).

Internet Links for Tantalite-(Mg)

mindat.org URL:
https://www.mindat.org/min-11465.html
Please feel free to link to this page.

Localities for Tantalite-(Mg)

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Russia (TL)
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Rezh District
          • Lipovka pegmatite field
Zap. Vseross. Mineral. Obshch., 132(2),; Lapis 28(10), 60 (2003); Igor.V. Pekov, Lyudmila R. Memetova (2008) Minerals of the Lipovka Granite Pegmatites, Central Urals, Russia. Mineralogical Almanac 13:6-45
Sri Lanka
 
  • Sabaragamuwa Province
    • Ratnapura District
      • Ratnapura
Ceylon Aluvial Mine, (Book, Co. 2002)
Mineral and/or Locality  
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