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Metahewettite

A valid IMA mineral species - grandfathered
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Photos of Metahewettite (47)
Metahewettite GallerySearch Photos of Metahewettite
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In allusion to its lesser water content and relationship to Hewettite.
Type Locality:
ⓘThompsons Mining District, Grand County, Utah, USA
A tertiary mineral resulting from the dehydration ofHewettite as impregnations in sandstone.


Unique Identifiers
IMA Formula:
CaV5+6O16 · 3H2O
First published:
1914
Type description reference:
Hillebrand, W.F., Merwin, H.E., Wright, F.E. (1914) Hewettite, metahewettite and pascoite, hydrous calcium vanadates. Proceedings of the American Philosophical Society: 53: 31-54.

Classification of Metahewettite
Dana 8th ed.:
47.3.1.2

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
Hey's CIM Ref.:
21.2.3

21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba

Mineral Symbols
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

Optical Data of Metahewettite
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.

Chemistry of Metahewettite

Crystallography of Metahewettite
General Appearance of Type Material:
Deep red, loose, earthy powder. Also as compact aggregates of separable, shining blades. The earthy variety consists of minute sharply bounded tables about 40 μm long, piled in subparallel groups.
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.
Geological Setting of Type Material:
Colorado Plateau-type U-V deposit. Impregnation in sandstone, generally coating the sandstone grains, sometimes filling cavities and crevices.
Associated Minerals at Type Locality:
Gypsum
Reference:
Hillebrand, W.F., Merwin, H.E., Wright, F.E. (1914) Hewettite, metahewettite and pascoite, hydrous calcium vanadates. Proceedings of the American Philosophical Society, 53, 31-54.
Download:
https://rruff.info/rruff_1.0/uploads/Proceedings_of_the_American_Philosophical_53_1914_31.pdf

Other Language Names for Metahewettite

Relationship of Metahewettite to other Species
Other Members of this group:
Barnesite(Na,Ca)V6O16 · 3H2OMon. 2/m :P2/m
Grantsite(Na,Ca)2+x(V5+,V4+)6O16 · 4H2OMon. 2/m :P21/m
Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.
HewettiteCaV6O16 · 9H2OMon. 2/m :P21/m

Common AssociatesTric.1 :P14.HE.10ShcherbinaiteV5+2O5Orth.mmm(2/m2/m2/m) :Pmmn4.HE.15HewettiteCaV6O16 · 9H2OMon. 2/m :P21/m4.HE.20BarianditeAl0.6(V5+,V4+)8O20 · 9H2OMon.4.HE.20Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2OMon. 2/m :B2/m4.HE.20Bokite(Al,Fe)1.3(V5+,V4+,Fe3+)8O20 · 7.5H2OMon.4.HE.20Fernandinite(Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2OMon. 2/m :B2/m4.HE.20Straczekite(Ca,K,Ba)(V5+,V4+)8O20 · 3H2OMon. 2/m :B2/m4.HE.25HäggiteV3+V4+O2(OH)3Mon. 2/m :B2/m4.HE.30DoloresiteV4+3O4(OH)4Mon. 2/m :B2/m4.HE.35DuttoniteV4+O(OH)2Mon. 2/m4.HE.40CavoiteCaV4+3O7Orth.mmm(2/m2/m2/m) :Pnma

Other Information
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    • References for MetahewettiteⓘBalasauskandyk V DepositAnthony (1997)Evseev (1995)+1 other reference
    Kyrgyzstan
     
    Karpenko et al. (2009)
    USA
     
    Peirce (1970)+1 other referencePierce (1970)+1 other referencePeirce (1970)+1 other referenceScarborough (1981)Peirce (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referencePeirce et al. (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referencePeirce et al. (1970)+1 other referencePierce (1970)+1 other referencePeirce et al. (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referenceRocks & Min.: 64:500.+3 other referencesChenoweth (1994)Peirce et al. (1970)+1 other referencePierce (1970)+1 other referencePierce (1970)+1 other referenceBarrett (1953)+1 other referencePatrick Haynes. ID by the late Howard ...MRDS database Dep. ID #10026929Rocks & Min.: 63:108.Eckel et al. (1997)Henderson et al. (1993)Palache et al. (1944)Rocks & Minerals 80:5 pp358-359Excalibur Mineral Co. sample and ...In the collection of Alex EarlPatrick Haynes (identified by me about 20 years ago)NBMG Bull 64 Geology and Mineral ...[Anthony (1997)+1 other referencewww.prophecydev.com (n.d.)+3 other referencesCastor et al. (2004)NMBMMR Memoir 15 Geology and Technology ...+1 other referenceNorthrop et al. (1996)New Mexico Bureau of Mines and Mineral ...NMBGMR Open-file Report - 466.+1 other referencedan weinrichMineralogical Society of America - ...USGS Bull 1063D+4 other referencesRoberts et al. (1965)Bullock (1981)DANA R. KELLEY AND PAUL F. KERR (1958)Thorne (n.d.)Bullock (1981)Bullock (1981)+1 other referenceBullock (1981)Am Min 16:273-277Bullock (1981)Hillebrand et al. (1914)Am. Min. 48 (1963)+1 other referenceBullock (1981)Thorne (n.d.)Bullock (1981)Carter et al. (1965)+1 other referenceThorne (n.d.)
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