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Metahewettite

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Formula:
CaV6O16 · 3H2O
System:
Monoclinic
Colour:
Deep red; red to orange ...
Member of:
Name:
In allusion to its lesser water content and relationship to Hewettite.
A tertiary mineral resulting from the dehydration of Hewettite as impregnations in sandstone.

Classification of Metahewettite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4.HE.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
47.3.1.2

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
21.2.3

21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba
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http://www.mindat.org/min-2674.html
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Type Occurrence of Metahewettite

General Appearance of Type Material:
Impregnations
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA: #93306. U.S. National Museum of Natural History, Washington, D.C., USA: #93305 through 93308.
Year of Discovery:
1914
Geological Setting of Type Material:
Colorado Plateau-type U-V deposit.

Occurrences of Metahewettite

Geological Setting:
Colorado Plateau-type U-V deposits.

Physical Properties of Metahewettite

Silky, Dull
Diaphaneity (Transparency):
Translucent
Colour:
Deep red; red to orange in transmitted light
Streak:
Maroon to brownish red
Comment:
Soft
Density:
2.51 - 2.94 g/cm3 (Measured)    3.05 g/cm3 (Calculated)
Comment:
Measured values are for material with 9H2O and 3H2O, respectively

Crystallography of Metahewettite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 12.15Å, b = 3.607Å, c = 18.44Å
β = 118.03°
Ratio:
a:b:c = 3.368 : 1 : 5.112
Unit Cell Volume:
V 713.34 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals microscopic laths or tablets, flattened on {001} and bounded laterally by {010} and {110}, with a prism angle of 57°; in parallel or radial-fibrous masses; pulverulent; coatings.
Comment:
Space Group = A2/m
X-Ray Powder Diffraction Data:
d-spacingIntensity
8.19 (100)
5.36 (12)
3.578 (30)
3.062 (18)
2.812 (24)
2.295 (17)
2.206 (22)

Optical Data of Metahewettite

Type:
Biaxial (-)
RI values:
nα = 1.700 nβ = 2.100 nγ = 2.230
2V:
Calculated: 52°
Max Birefringence:
δ = 0.530
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively strong
Pleochroism:
Visible
Comments:
X = c = Light yellow-orange
Y = b = Deep red
Z = a = Deeper red
Comments:
2V measured: not determined.

Chemical Properties of Metahewettite

Formula:
CaV6O16 · 3H2O
Essential elements:
All elements listed in formula:

Relationship of Metahewettite to other Species

Member of:
Other Members of Group:
Barnesite(Na,Ca)V6O16 · 3H2O
Grantsite(Na,Ca)2+x(V5+,V4+)6O16 · 4H2O
Hendersonite(Ca,Sr)1.3V6O16 · 6H2O
HewettiteCaV6O16 · 9H2O
Common Associates:
4.HE.05MelanovanaditeCa(V5+,V4+)4O10 · 5H2O
4.HE.10ShcherbinaiteV25+O5
4.HE.15HewettiteCaV6O16 · 9H2O
4.HE.20BarianditeAl0.6(V5+,V4+)8O20 · 9H2O
4.HE.20Bokite(Al,Fe3+)1.3(V5+,V4+,Fe3+)8O20 · 7.4H2O
4.HE.20Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
4.HE.20Fernandinite(Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2O
4.HE.20Straczekite(Ca,K,Ba)(V5+,V4+)8O20 · 3H2O
4.HE.25HäggiteV3+V4+O2(OH)3
4.HE.30DoloresiteV34+O4(OH)4
4.HE.35DuttoniteV4+O(OH)2
4.HE.40CavoiteCaV34+O7
21.2.1MetarossiteCa(V2O6) · 2H2O
21.2.2RossiteCa(V2O6) · 4H2O
21.2.4HewettiteCaV6O16 · 9H2O
21.2.5PintadoiteCa2(V2O7) · 9H2O
21.2.6Hendersonite(Ca,Sr)1.3V6O16 · 6H2O
21.2.7Fernandinite(Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2O
21.2.8PascoiteCa3(V10O28) · 17H2O
21.2.9SherwooditeCa4.5(AlV24+V125+O40) · 28H2O
21.2.10MelanovanaditeCa(V5+,V4+)4O10 · 5H2O
21.2.11Grantsite(Na,Ca)2+x(V5+,V4+)6O16 · 4H2O
21.2.12HummeriteK2Mg2(V10O28) · 16H2O
21.2.13MetadelrioiteCaSr(V2O6)(OH)2
21.2.14DelrioiteCaSr(V2O6)(OH)2 · 3H2O
21.2.15Straczekite(Ca,K,Ba)(V5+,V4+)8O20 · 3H2O
21.2.16GamagariteBa2Fe3+(VO4)2(OH)

Other Names for Metahewettite

Name in Other Languages:

Other Information

Other Information:
Reversibly hydrates to Hewettite. Slightly soluble in water.
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 Metahewettite

Reference List:
Hillebrand, Merwin, and Wright (1914) Proceedings of the American Philosophical Society: 53: 31.

Hillebrand, Merwin, and Wright (1914) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 54: 209.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1061-1062.

H. G. Bachmann and W. H. Barnes (1962): The crystal structure of a sodium-calcium variety of metahewettite. Can. Mineral. 7, 219-235.

Bayliss, P. (1979) X-ray powder data for metahewettite. Mineralogical Magazine, 43, 550.

Bayliss, P. (1982) X-ray powder data for hewettite. Mineralogical Magazine, 46,
503–504.

Evans, H.T., Jr. and J.M. Hughes (1990) Crystal chemistry of the natural vanadium bronzes. American Mineralogist: 75: 508-521.

Internet Links for Metahewettite

Localities for Metahewettite

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.
(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.
Kazakhstan
 
  • Southern Kazakhstan Province (Ongtüstik Qazaqstan Oblysy; Yuzhno-Kazakhstanskaya Oblast')
    • Karatau Range
      • Aksumbe
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 43
Kyrgyzstan
 
  • Osh Oblast
    • Alai Range (Alay Range)
      • Fergana Valley
        • Fergana
Karpenko, V.Yu. et al. Zapiski RMO 138(1)83(2009)
USA
 
  • Arizona
    • Apache & Navajo Cos.
      • White Canyon-Monument Valley District
Patrick Haynes (identified by me about 20 years ago)
    • Apache Co.
Chenoweth, W.L. (1973), Uranium deposits of northwestern Arizona, New Mexico Geol. Soc. 24th. guidebook: 1147-148; Peirce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of northwestern Arizona, New Mexico Geol. Soc. 24th. guidebook: 147-148; Peirce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182.
Chenoweth, W.L. (1973), Uranium deposits of northwestern Arizona, New Mexico Geol. Soc. 24th. guidebook: 147-148; Peirce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of northwestern Arizona, New Mexico Geol. Soc. 24th. field guidebook: 147-148; Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of northwestern Arizona, New Mexico Geol. Soc. 24th. field guidebook: 147-148; Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182.
Chenoweth, W.L. (1973), Uranium deposits of northwestern Arizona, New Mexico Geol. Soc. 24th. field guidebook: 147-148; Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
      • Navajo Indian Reservation
        • Monument Valley
          • Monument No. 2 channel
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 294; Finnell, T.L. (1957), Structural control of uranium ore at the Monument No. 2 mine, Apache Co., AZ, Econ.Geol.: 52: 25-35; Rocks & Min.: 64:500.; Mineralogical Magazine 1979 43 : 550-550
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of northwestern Arizona, New Mexico Geol. Soc. 24th. field guidebook: 147-148; Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
Chenoweth, W.L. (1973), Uranium deposits of NE Arizona, New Mexico Geol. Soc. 24th. Guidebook: 147-148; Pierce, W.H. (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 252-254.
    • Coconino Co.
      • Vermillion Cliffs District
Peirce, H.W., S.B. Keith and J.C.Wilt (1970), Coal, oil, natural gas, helium, and uranium in Arizona, AZ Bur. Mines Bull. 182: 218; Barrett, D.C. & C. Collins (1953), Preliminary Reconnaissance Report, US Atomic Energy Comm. USAEL, RME 155.
    • Navajo Co.
Patrick Haynes. ID by the late Howard Evans, Jr.
    • Yavapai Co.
      • Bradshaw Mts (Bradshaw Range)
        • Big Bug District
          • Poland
MRDS database Dep. ID #10026929, MRDS ID #M001123.
  • Arkansas
    • Garland Co.
      • Wilson Springs (Potash Sulfur Springs)
Rocks & Min.: 63:108.
  • Colorado
    • Mesa Co.
      • Uravan District
        • Calamity Mesa
Minerals of Colorado (1997) Eckels, E. B.
    • Montrose Co.
      • Uravan District
        • Paradox Valley
Dana 7:I:602.
Min Rec (1993) 24:311-314
    • San Miguel Co.
      • Bull Pen Canyon
Rocks & Minerals 80:5 pp358-359
      • Uravan District
        • Carnation Mine group
Excalibur Mineral Co. sample and analysis
  • Nevada
    • Eureka Co.
      • Gibellini District
NBMG Bull 64 Geology and Mineral Resources of Eureka County, Nevada
NBMG Spec. Pub. 31 Minerals of Nevada; [Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 4, 362
        • Fish Creek Range
American Mineralogist (1979), 64:713-720
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Mexico
    • Cibola Co.
      • Grants District
NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region; Kittel, Kelley Melancon (1966) Uranium Deposits of the Grants Region. New Mexico Geological Society Guidebook pp 173-183
    • McKinley Co.
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
New Mexico Bureau of Mines and Mineral Resources, Mineral Museum no. 15244
    • San Juan Co.
      • Shiprock District
        • Eastside mines
NMBGMR Open-file Report - 466
  • Oregon
Dan Weinrich
  • South Dakota
    • Fall River Co.
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"; USGS Bull 1063D; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp345-349
        • Craven Canyon
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
  • Utah
    • Emery Co.
      • San Rafael District (San Rafael Swell)
UGMS Bull 117 Minerals and Mineral Localities of Utah
DANA R. KELLEY AND PAUL F. KERR (1958) URANO-ORGANIC ORE AT TEMPLE MOUNTAIN, UTAH. BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA VOL. 69. PP. 701-756.
UGMS Bull 117 Minerals and Mineral Localities of Utah; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Garfield Co.
      • Henry Mts
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Grand Co.
UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Polar Mesa District (Polar Mesa)
Am Min 16:273-277
UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Thompsons District
        • Yellow Cat District
UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Yellow Cat District (W. part of Thompsons District)
        • Cisco
UGMS Bull 117 Minerals and Mineral Localities of Utah; Am. Min. 48 (1963), 1187-1195
Collected by and in the collection of Brent Thorne.
    • San Juan Co.
      • Paradox Valley
        • Paradox Valley District
UGMS Bull 117 Minerals and Mineral Localities of Utah
Collected by and in the collection of Brent Thorne.
Mineral and/or Locality  
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