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Sherwoodite

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About SherwooditeHide

Formula:
Ca4.5(AlV4+2V5+12O40) · 28H2O
Colour:
Dark bluish black (fresh), blue-green, yellow-green (altered)
Lustre:
Vitreous, Earthy
Hardness:
2
Specific Gravity:
2.8
Crystal System:
Tetragonal
Name:
For Alexander M. Sherwood (b. 1888), an analytical chemist of the United States Geological Survey (USGS).
This mineral contains aluminovanadate(IV,V) polyanions, consisting of 14 (VO6) octahedra condensed by edge-sharing around a central (AlO6) octahedron (Evans and Konnert, 1978).


Classification of SherwooditeHide

Approved, 'Grandfathered' (first described prior to 1959)
4.HC.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
C : [6]-Sorovanadates
47.2.4.1

47 : VANADIUM OXYSALTS
2 : Anhydrous Vanadium Oxysalts Containing Hydroxyl or Halogen
21.2.9

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

Pronounciation of SherwooditeHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of SherwooditeHide

Vitreous, Earthy
Colour:
Dark bluish black (fresh), blue-green, yellow-green (altered)
Hardness:
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
2.8(1) g/cm3 (Measured)    

Optical Data of SherwooditeHide

Type:
Uniaxial (-)
RI values:
nω = 1.765(3) nε = 1.735 - 1.738
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Visible
Comments:
O = green to yellow-brown; E = blue to deep
blue-green

Chemical Properties of SherwooditeHide

Formula:
Ca4.5(AlV4+2V5+12O40) · 28H2O
IMA Formula:
Ca4.5AlV4+2V5+12O40 · 28H2O

Crystallography of SherwooditeHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/amd
Setting:
I41/amd
Cell Parameters:
a = 28.06(3) Å, c = 13.56(2) Å
Ratio:
a:c = 1 : 0.483
Unit Cell V:
10,676.65 ų (Calculated from Unit Cell)
Z:
4

Geological EnvironmentHide

Geological Setting:
sandstone uranium deposits

Type Occurrence of SherwooditeHide

Other Language Names for SherwooditeHide

German:Sherwoodit
Simplified Chinese:柱水钒钙矿
Spanish:Sherwoodita
Traditional Chinese:柱水釩鈣礦

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Sherwoodite associated with PascoiteCa3(V10O28) · 17H2O
2 photos of Sherwoodite associated with RossiteCa(VO3)2•4H2O

Related Minerals - Nickel-Strunz GroupingHide

4.HC.Ammoniolasalite(NH4)2Mg2(H2O)20] [V10O28]Mon. 2/m : B2/b
4.HC.05PascoiteCa3(V10O28) · 17H2OMon. 2 : B2
4.HC.05LasaliteNa2Mg2(V10O28) · 20H2OMon. 2/m : B2/b
4.HC.05MagnesiopascoiteCa2Mg(V10O28) · 16H2OMon. 2/m : B2/m
4.HC.10HummeriteK2Mg2(V10O28) · 16H2OTric.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.2.1MetarossiteCa(V2O6) · 2H2OTric. 1 : P1
21.2.2RossiteCa(VO3)2•4H2OTric. 1 : P1
21.2.3MetahewettiteCaV6O16 · 3H2OMon. 2/m
21.2.4HewettiteCaV6O16 · 9H2OMon. 2/m : P21/m
21.2.5PintadoiteCa2(V2O7) · 9H2O
21.2.6Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.
21.2.7Fernandinite(Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2OMon. 2/m : B2/m
21.2.8PascoiteCa3(V10O28) · 17H2OMon. 2 : B2
21.2.10MelanovanaditeCa(V5+,V4+)4O10 · 5H2OTric. 1 : P1
21.2.11Grantsite(Na,Ca)2+x(V5+,V4+)6O16 · 4H2OMon. 2/m : P21/m
21.2.12HummeriteK2Mg2(V10O28) · 16H2OTric.
21.2.13MetadelrioiteCaSr(V2O6)(OH)2Tric.
21.2.14DelrioiteCaSr(V2O6)(OH)2 · 3H2OMon.
21.2.15Straczekite(Ca,K,Ba)(V5+,V4+)8O20 · 3H2OMon.
21.2.16GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m

Other InformationHide

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 SherwooditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Thompson, M.E., Roach, C.H., and Meyrowitz, R. (1958): Sherwoodite, a mixed vanadium(IV)-vanadium(V) mineral from the Colorado Plateau. American Mineralogist 43, 749-755.
Evans, Jr., H.T., and Konnert, J.A. (1978): The crystal chemistry of sherwoodite, a calcium l4-vanadoaluminate heteropoly complex. American Mineralogist 63, 863-868.

Internet Links for SherwooditeHide

Localities for SherwooditeHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Pardubice Region
    • Chrudim District
      • Prachovice
Sejkora J., Škácha P., Venclík V., Plášil J. (2013): Vanad-uranová mineralizace v lomu Prachovice (Česká republika) [anadium-uranium mineralization in the Prachovice quarry (Czech Republic)]. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 21, 113-130.
Ecuador
 
  • Loja Province
Manrique, J., Guaman, G., & Guartan, J. (2018). Geochemical Prospecting Study of the Vanadium-Uranium Mineralization of Puyango, Ecuador (No. IAEA-CN--261).
Peru
 
  • Pasco
    • Pasco Province
      • Huayllay District
Handbook of Mineralogy
USA
 
  • Arizona
    • Apache County
Chenoweth, W. L. (1994). The Location and Production History of the Chimney No. 1 Uranium-Vanadium Mine, Apache County, Arizona. Arizona Geological Survey Contributed Report 94-B
      • Lukachukai Mountains
        • Lukachukai Mining District
          • White Ash Peak
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 370.
  • Colorado
    • Mesa Co.
      • Gateway
Kampf, A.R., Nash, B.P., Marty, J., Hughes, J.M. (2017) Mesaite, CaMn2+5(V2O7)3·12H2O, a new vanadate mineral from the Packrat mine, near Gateway, Mesa County, Colorado, USA. Mineralogical Magazine: 81: 319–327.
      • Uravan Mining District
        • Calamity Mesa
Thompson, M.E., Roach, C.H., and Meyrowitz, R. (1958): American Mineralogist 43, 749-755
    • Montrose Co.
      • Uravan Mining District
        • Bull Canyon
Thompson, M.E., Roach, C.H., and Meyrowitz, R. (1958): American Mineralogist 43, 749-755
        • Paradox Valley
Thompson, M.E., Roach, C.H., and Meyrowitz, R. (1958): American Mineralogist 43, 749-755
Thompson, M.E., Roach, C.H., and Meyrowitz, R. (1958): American Mineralogist 43, 749-755
Minerals of Colorado (1997) E.B. Eckel
    • San Miguel Co.
      • Lower San Miguel Mining District
Thompson, M.E., Roach, C.H., and Meyrowitz, R. (1958): American Mineralogist 43, 749-755
      • Slick Rock Mining District
Kampf, A. R., Plášil, J., Nash, B. P., & Marty, J. (2019). Ammoniomathesiusite, a new uranyl sulfate–vanadate mineral from the Burro mine, San Miguel County, Colorado, USA. Mineralogical Magazine, 83(1), 115-121.
Kampf, A.R., Hughes, J.M., Marty, J., Gunter, M.E., Nash, B. (2011): Rakovanite, Na3{H3[V10O28]}·15H2O, a new member of the pascoite family with a protonated decavanadate polyanion. Canadian Mineralogist: 49: 595-604.
      • Uravan Mining District
        • Carnation Mine group
Excalibur Mineral Co. sample and analysis
Collected by and in the collection of Brent Thorne.
  • New Mexico
    • San Juan Co.
      • Shiprock District
        • Eastside mines
NMBGMR Open-file Report - 466
Thompson, M.E., Roach, C.H., and Meyrowitz, R. (1958): American Mineralogist 43, 749-755
  • Utah
    • Grand Co.
      • Polar Mesa Mining District
Collected by and in the collection of Brent Thorne.
Collection of Joe Marty
        • Yellow Cat Mesa
Kasatkin, A.V., Plášil, J., Marty, J., Belakovskiy, D.I., Lykova, I.S. (2014): Nestolaite, CaSeO3·H2O, a new mineral from the Little Eva mine, Grand County, Utah, USA. Mineralogical Magazine, 78, 497-505. ; Kasatkin, A. V., Plasil, J., Pekov, I. V., Belakovskiy, D. I., Nestola, F., Cejka, J., ... & Thorne, B. (2015). Karpenkoite, Co3 (V2O7)(OH) 2· 2H2O, a cobalt analogue of martyite from the Little Eva mine, Grand County, Utah, USA. Journal of Geosciences, 60(4), 251-257.
      • Wilson Mesa
Thompson, M.E., Roach, C.H., and Meyrowitz, R. (1958): American Mineralogist 43, 749-755
    • San Juan Co.
      • La Sal Mountains
        • La Sal Mining District (Paradox Valley Mining District)
          • Lion Canyon
Canadian Mineralogist 46,687-692(2008); Kampf A R, Hughes J M, Marty J, Nash B (2012) Postite, Mg(H2O)6Al2(OH)2(H2O)8(V10O28)·13H2O, a new mineral species from the La Sal Mining District, Utah: Crystal structure and descriptive mineralogy. The Canadian Mineralogist 50, 45-53
      • La Sal Quadrangle
Canadian Mineralogist (2001) 39, 6, 1691-1700
 
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