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Tungstibite

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Big Photo

Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
© Stephan Wolfsried

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Formula:
Sb
3+
2
WO
 
6
System:OrthorhombicColour:Green to dark green, ...
Lustre:Pearly, DullHardness:2
Name:The name refers to its tungsten (tung) and antimony (Latin = stibium) (stib) content.


The Sb analogue of Russellite.

Classification of Tungstibite

IMA status:Approved 1993
Strunz 8th edition ID:4/E.0-20
Nickel-Strunz 10th (pending) edition ID:4.DE.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
E : With medium-sized cations; with various polyhedra
Dana 7th edition ID:48.2.3.1
Dana 8th edition ID:48.2.3.1

48 : ANHYDROUS MOLYBDATES AND TUNGSTATES
2 : A2XO4
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Type Occurrence of Tungstibite

Type Locality:Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany

Physical Properties of Tungstibite

Lustre:Pearly, Dull
Diaphaneity (Transparency):Translucent, Opaque
Colour:Green to dark green, yellow
Streak:Greenish
Hardness (Mohs):2
Density (calculated):6.9 g/cm3

Crystallography of Tungstibite

Crystal System:Orthorhombic
Class (H-M):2 2 2 - Disphenoidal
Cell Parameters:a = 8.59Å, b = 9.58Å, c = 6.12Å
Ratio:a:b:c = 0.897 : 1 : 0.639
Unit Cell Volume:V 503.63 ų
Z:4
Morphology:Elongated blady crystals, flattened on (001). Often aggregate into radiating spheres.
X-Ray Powder Diffraction:
d-spacingIntensity
3.32 (10)
3.06 (10)
2.98 (4)
2.73 (6)
2.46 (5)
1.919 (4)
1.829 (3)

Optical Data of Tungstibite

Type:Biaxial (+)
RI values: nα = 2.285 nβ = 2.400 nγ = 2.580
2V:Measured: 82° , Calculated: 84°
Maximum Birefringence:δ = 0.295

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:strong
Pleochroism:Visible
Comments:X = dark green to brownish green
Y = dark green
Z = pale green to yellowish
Z = c

Chemical Properties of Tungstibite

Formula:
Sb
3+
2
WO
 
6
Essential elements:O, Sb, W
All elements listed in formula:O, Sb, W

Relationship of Tungstibite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.DE.05Downeyite
SeO
 
2
4.DE.10Koragoite
(Mn
2+
 
,Fe
3+
 
)
 
3
(Nb,Ta,Ti)
 
2
(Nb,Mn)
 
2
(W,Ta)
 
2
O
 
20
4.DE.15Koechlinite
Bi
 
2
MoO
 
6
4.DE.15Russellite
Bi
 
2
WO
 
6
4.DE.20Tellurite
TeO
 
2
4.DE.25Paratellurite
TeO
 
2
4.DE.30Bismutotantalite
Bi(Ta,Nb)O
 
4
4.DE.30Bismutocolumbite
Bi(Nb,Ta)O
 
4
4.DE.30Cervantite
Sb
3+
 
Sb
5+
 
O
 
4
4.DE.30Stibiotantalite
Sb(Ta,Nb)O
 
4
4.DE.30Stibiocolumbite
Sb(Nb,Ta)O
 
4
4.DE.30Clinocervantite
Sb
3+
 
Sb
5+
 
O
 
4
4.DE.35Baddeleyite
ZrO
 
2

Other Names for Tungstibite

Synonyms:
IMA1993-059Sb-W-Mineral
Other Languages:
German:Tungstibit
Spanish:Tungstibita

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 Tungstibite

Reference List:

- +
Walenta, K. (1995): Tungstibit, Sb2O3-WO3 - ein neues Mineral von der Grube Clara bei Oberwolfach im mittleren Schwarzwald (Deutschland). Chemie die Erde: 55: 217-224. (in German).

Mineralogical Record: 27: 394.

Internet Links for Tungstibite

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    • Localities for Tungstibite

    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
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		WALENTA, K. (1995): Tungstibit, Sb2O3-WO3 - ein neues Mineral von der Grube Clara bei Oberwolfach im mittleren Schwarzwald (Deutschland). - Chem. Erde 55, 217-224.; KOLITSCH, U., GRÖBNER, J. & BAYERL, R. (1995): Die Mineralien der Silber-Antimon-Vererzungen der Grube Clara im Zeitraum 1993 bis 1995. - Erzgräber 9 (2), 61-77.
    Thailand
     
    • Phrae Province
    		Dill, H.G., Melcher, F., and Botz, R. (2008): Ore Geology Reviews 34, 242-262.
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