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Steigerite

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About SteigeriteHide

George Steiger
Formula:
Al(VO4) · 3H2O
Colour:
Canary-yellow, greenish yellow, olive-green
Lustre:
Waxy
Hardness:
2½ - 3
Specific Gravity:
2.52 - 2.58
Crystal System:
Monoclinic
Name:
Named in honor of George Steiger (27 May 1869, Columbia, Pennsylvania, USA - 18 April 1944, Washington, D.C., USA), Chief Chemist, United States Geological Survey, Washington, D.C., USA.
A secondary mineral occurring either as impregnations in sandstones or as a weathering product from vanadium-rich schists.


Classification of SteigeriteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.CE.65

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
40.4.5.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O
21.3.1

21 : Vanadates (and vanadates with arsenate or phosphate)
3 : Vanadates of Al, rare earths, Pb, V or Bi

Physical Properties of SteigeriteHide

Transparency:
Translucent
Comment:
Lustre waxy in compact aggregates
Colour:
Canary-yellow, greenish yellow, olive-green
Hardness:
2½ - 3 on Mohs scale
Tenacity:
Fragile
Cleavage:
Perfect
On {010}, perfect; on {100}, fair.
Density:
2.52 - 2.58 g/cm3 (Measured)    2.58 g/cm3 (Calculated)

Optical Data of SteigeriteHide

Type:
Biaxial (+)
RI values:
nα = 1.720 - 1.730 nβ = 1.730 - 1.734 nγ = 1.748 - 1.752
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
relatively strong

Chemical Properties of SteigeriteHide

Formula:
Al(VO4) · 3H2O

Crystallography of SteigeriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 11.84 Å, b = 25 Å, c = 11.04 Å
β = 111.17°
Ratio:
a:b:c = 0.474 : 1 : 0.442
Unit Cell V:
3,047.30 ų (Calculated from Unit Cell)
Z:
24
Morphology:
Cryptocrystalline fibrous, may be flat platy {010} Gumlike to compact massive, commonly as pulverulent coatings.
Comment:
Class is either 2/ or 2; space group is either P21/m or P21.

Type Occurrence of SteigeriteHide

General Appearance of Type Material:
Fracture cotings
Place of Conservation of Type Material:
U.S. National Museum of Natural History, Washington, D.C., USA: #C5108.
Geological Setting of Type Material:
Nodular concretions of Corvusite in sandstone.
Associated Minerals at Type Locality:

Other Language Names for SteigeriteHide

German:Steigerit
Spanish:Steigerita

Varieties of SteigeriteHide

ChromsteigeriteA Chromian Steigerite.

Common AssociatesHide

AluniteKAl3(SO4)2(OH)6
Corvusite(Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O
DelvauxiteCaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmed ·
FervaniteFe3+4V5+4O16 · 5H2O
GypsumCaSO4 · 2H2O
HalloysiteAl2(Si2O5)(OH)4
HewettiteCaV6O16 · 9H2O
NavajoiteFe3+V5+9O24 · 12H2O
RauviteCa(UO2)2(V10O28) · 16H2O
SatpaeviteAl12V4+2V5+6O37 · 30H2O
TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2O
VanaliteNaAl8V10O38 · 30H2O
VarisciteAlPO4 · 2H2O
VashegyiteAl11(PO4)9(OH)6 · 38H2O
Associated Minerals Based on Photo Data:
Vanoxite2 photos of Steigerite associated with Vanoxite on mindat.org.
Gypsum2 photos of Steigerite associated with Gypsum on mindat.org.
Barnesite1 photo of Steigerite associated with Barnesite on mindat.org.
Bokite1 photo of Steigerite associated with Bokite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CE.XBabánekiteCu3(AsO4)2 · 8H2O Mon. 2/m : B2/m
8.CE.05Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2OTric.
8.CE.05GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
8.CE.10NewberyiteMg(HPO4) · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CE.15BrassiteMg(HAsO4) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CE.20PhosphorrössleriteMg(HPO4) · 7H2OMon. 2/m : P2/b
8.CE.20RößleriteMg(HAsO4) · 7H2OMon. 2/m : B2/b
8.CE.25MetaswitzeriteMn2+3(PO4)2 · 4H2OMon. 2/m : P2/b
8.CE.25Switzerite(Mn,Fe)3(PO4)2 · 7H2OMon.
8.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1
8.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2OTric. 1 : P1
8.CE.35BobierriteMg3(PO4)2 · 8H2OMon. 2/m : B2/b
8.CE.40AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ArupiteNi3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ErythriteCo3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40FerrisymplesiteFe3+3(AsO4)2(OH)3 · 5H2O
8.CE.40HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40Manganohörnesite(Mn,Mg)3(AsO4)2 · 8H2OMon. 2/m : P2/m
8.CE.40ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40VivianiteFe2+3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.45SymplesiteFe2+3(AsO4)2 · 8H2OTric. 1 : P1
8.CE.50CattiiteMg3(PO4)2 · 22H2OTric. 1 : P1
8.CE.55KoninckiteFe3+PO4 · 3H2OTet.
8.CE.60KaňkiteFeAsO4 · 3.5H2OMon.
8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2OMon. 2/m : P2/m
8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2OMon.
8.CE.75MalhmooditeFeZr(PO4)2 · 4H2OMon.
8.CE.75ZigrasiteMgZr(PO4)2 · 4H2OTric. 1 : P1
8.CE.75Unnamed (Ca-analogue of Zigrasite)CaZr[PO4]2 · 4H2OTric.
8.CE.80SantabarbaraiteFe3+3(PO4)2(OH)3 · 5H2OAmor.
8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)Tric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.3.2Alvanite(Zn,Ni)Al4(V5+O3)2(OH)12 · 2H2OMon. 2/m : P21/m
21.3.3MetaschoderiteAl2(PO4)(VO4) · 6H2OMon. 2/m : P2/m
21.3.4SchoderiteAl2(PO4)(VO4) · 8H2OMon.
21.3.5SatpaeviteAl12V4+2V5+6O37 · 30H2O
21.3.6VanaliteNaAl8V10O38 · 30H2OMon.
21.3.7Wakefieldite-(Ce)Ce(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
21.3.7Wakefieldite-(Y)Y(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
21.3.8ChervetitePb2(V2O7)Mon.
21.3.9MottramitePbCu(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
21.3.10DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
21.3.11ClinobisvaniteBi(VO4)Mon. 2/m
21.3.11DreyeriteBi(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
21.3.11PucheriteBi(VO4)Orth. mmm (2/m 2/m 2/m)
21.3.12SchumacheriteBi3(VO4)2O(OH)Tric.
21.3.13NamibiteCu(BiO)2(VO4)(OH)Tric. 1 : P1
21.3.14Pottsite(Pb3xBi4-2x)(VO4)4·H2O (0.8 < x < 1.0)Tet. 4/m : I41/a
21.3.15Duhamelite(Pb,Bi,Ca)Cu(VO4)(OH,O)Orth.

Other InformationHide

Notes:
Readily soluble in dilute mineral acids to a deep cherry-red solution. Insoluble 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 SteigeriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Henderson, E.P. (1935) Steigerite, a new vanadium mineral. American Mineralogist: 20: 769-772.
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.: 1049-1050.
Ankinovich, E.A., Kurmakaeva, F.A., Zazubina, I.S. (1987) Steigerite and vanalite from carbonaceous-siliceous vanadium-bearing formations of northwestern Kara-Tau (southern Kazakhstan).Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 116: 100–113 (in Russian with English abstract).

Internet Links for SteigeriteHide

Localities for SteigeriteHide

ⓘ - 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.
Kazakhstan
 
  • Turkistan
    • 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
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
      • Ran River valley
Amer.Mineral. (1961) 46, 1200 (abs).
USA
 
  • Arizona
    • Apache Co.
      • Monument Valley
        • Yazzi Mesa
          • Monument No. 2 channel
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 380; Witkind, I.J. & R.E. Thaden (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache and Navajo Cos., AZ: 117; Weeks, A.D., et al (1955), Navajoite, a new vanadium oxide from AZ, Am.Min.: 40: 207-212; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 77
  • Colorado
    • Mesa Co.
      • Uravan District
        • Calamity Mesa
Minerals of Colorado (1997) E.B. Eckel
Minerals of Colorado (1997) Eckel, E. B.
    • Montrose Co.
      • Uravan District
Minerals of Colorado (1997) E.B. Eckel
    • San Miguel Co.
      • Gypsum Valley District
Minerals of Colorado (1997) E.B. Eckel
Amer.Min(1935) 20, 769-772; "Minerals of Colorado, updated & revised", p. 455, by Eckel, Edwin B., 1997
  • Utah
    • Grand Co.
      • Thompsons District (S. E. Thomsons)
        • The Poison Strip
UGMS Bull 117 Minerals and Mineral Localities of Utah
Mineral and/or Locality  
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