Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Hydrotungstite

Big Photo

Lutsiro, Sebeya river, Rwanda
© R.Kristiansen

Formula:
WO
 
3
·2H
 
2
O
System:MonoclinicHardness:2
This page provides mineralogical data about Hydrotungstite.

Classification of Hydrotungstite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:4/E.02-30
Nickel-Strunz 10th (pending) edition ID:4.FJ.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
J : Hydroxides with H2O +- (OH); corner-sharing octahedra
Dana 8th edition ID:49.1.1.1

49 : HYDRATED MOLYBDATES AND TUNGSTATES
1 : Acid Hydrated Molybdates and Tungstates
Hey's CIM Ref.:7.15.6

7 : Oxides and Hydroxides
15 : Oxides of Mo and W
mindat.org URL:http://www.mindat.org/min-1988.html
Please feel free to link to this page.

Type Occurrence of Hydrotungstite

Type Locality:San Antonio de Calacalani mine, Cercado Province, Oruro Department, Bolivia
Year of Discovery:1940

Physical Properties of Hydrotungstite

Hardness (Mohs):2

Crystallography of Hydrotungstite

Crystal System:Monoclinic
Cell Parameters:a = 7.45Å, b = 6.92Å, c = 3.72Å
β = 90.5°
Ratio:a:b:c = 1.077 : 1 : 0.538
Unit Cell Volume:V 191.77 ų (Calculated from Unit Cell)

Optical Data of Hydrotungstite

Type:Biaxial (-)
RI values: nα = 1.700 nβ = 1.950 nγ = 2.040
2V:Measured: 52° , Calculated: 54°
Maximum Birefringence:δ = 0.340

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:relatively strong

Chemical Properties of Hydrotungstite

Formula:
WO
 
3
·2H
 
2
O
Essential elements:H, O, W
All elements listed in formula:H, O, W

Relationship of Hydrotungstite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.FJ.05Meymacite
WO
 
3
·2H
 
2
O
4.FJ.05Sidwillite
MoO
 
3
·2H
 
2
O
4.FJ.10Tungstite
WO
 
3
·H
 
2
O
4.FJ.15Ilsemannite
Mo
 
3
O
 
8
·nH
 
2
O
4.FJ.20Parabariomicrolite
BaTa
 
4
O
 
10
(OH)
 
2
·2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
7.15.1Tugarinovite
MoO
 
2
7.15.2Molybdite
MoO
 
3
7.15.3Sidwillite
MoO
 
3
·2H
 
2
O
7.15.4Ilsemannite
Mo
 
3
O
 
8
·nH
 
2
O
7.15.5Tungstite
WO
 
3
·H
 
2
O
7.15.7Meymacite
WO
 
3
·2H
 
2
O
7.15.8Alumotungstite
(W,Al)(O,OH)
 
3
7.15.9Jixianite
Pb(W,Fe
3+
 
)
 
2
(O,OH)
 
7

Other Names for Hydrotungstite

Synonyms:
Hydrotungstenite
Other Languages:
German:Hydrotungstit
Spanish:Hydrotungstita

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 Hydrotungstite

Reference List:American Mineralogist: 29: 192-210.

Mineralogical Record (1981): 12: 81-85.

Articles/Blogs about Hydrotungstite

Internet Links for Hydrotungstite

Search Engines:
  • Look for Hydrotungstite on Google
  • Look for Hydrotungstite images on Google
    • External Links:
  • Look for Hydrotungstite on Webmineral
  • Look for Hydrotungstite on Athena Mineralogy
  • Look for Hydrotungstite on Wikipedia
  • Look for Hydrotungstite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Hydrotungstite in the Natural History Museum (London) online catalogue
  • Hydrotungstite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • rare and unusual minerals mainly crystallized
  • Search for Hydrotungstite on minvision.com
  • Wendel Minerals - Auktion & Shop
  • The Arkenstone - Fine Minerals
  • Buy fine minerals and gemstones from Pala International
  • High-end worldwide specimens & outstanding customer service
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Buy Fine Minerals from mineralsweb.com
  • Buy minerals from Mineralium.com
  • Search for Hydrotungstite at Thames Valley Minerals
  • Top quality minerals from Kristalle of California
  • Fine Minerals from Dan Weinrich Minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Hydrotungstite

    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.
    These maps work faster with Firefox!
    (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.
    Austria
     
    • Tyrol
      • North Tyrol
        • Ziller valley
          • Tux valley
            • Tux (Lanersbach; Lannersbach)
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Bolivia
     
    • Oruro Department
      • Cercado Province
    		Amer. Mineral. (1944) 29, 192–210
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German)
    Japan
     
    • Honshu Island
      • Kinki Region
        • Kyoto Prefecture
          • Kameoka City
    		Matsuo et al (1981) Kyoto Chigakukaisha, 34, 6-43
    Norway
     
    • Oppland
      • Lunner
        • Grua Mining District
    		NHM, Oslo XRD / SEM-EDS
    Portugal
     
    • Castelo Branco District
      • Covilhã
        • Panasqueira
    		No reference listed
    Rwanda
     
    • Sebeya river
    		Roy Kristiansen
    USA
     
    • Connecticut
      • Fairfield Co.
        • Trumbull
    		Jeremy Zolan
    • Nevada
      • Churchill Co.
        • Toy District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.