Mineralogy Database

Wupatkiite Mineral Data

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General Wupatkiite Information

Help on Chemical  Formula: Chemical Formula: (Co,Mg,Ni)Al2(SO4)4•22(H2O)
Help on Composition: Composition: Molecular Weight = 883.07 gm
   Magnesium   0.83 %  Mg    1.37 % MgO
   Aluminum    6.11 %  Al   11.55 % Al2O3
   Cobalt      4.00 %  Co    5.09 % CoO
   Nickel      0.66 %  Ni    0.85 % NiO
   Hydrogen    5.02 %  H    44.88 % H2O
   Sulfur     14.52 %  S    36.27 % SO3
   Oxygen     68.85 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Co0.6Mg0.3Ni0.1Al2(SO4)4•22(H2O)
Help on Environment: Environment: Secondary alteration of primary U-Co-Ni-Mo deposit in the Shinarump member of the upper Chinle Formation.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: On the walls of a shallow open cut 8 miles ESE of Gray Mountain, Coconino County, Arizona USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the prehistoric pueblo dwelling near the locality.
Help on Name Pronunciation: Name Pronunciation: Wupatkiite + Pronunciation Say WUPATKIITE
Help on Synonym: Synonym: IMA1994-019

Wupatkiite Image

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Comments: Pinkish yellow opaque wupatkiite microcrystal in sandstone.
Location: Cameroon, Coconino County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wupatkiite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.2554:1:1.2876
Help on Cell Dimensions: Cell Dimensions: a = 6.189, b = 24.23, c = 31.2, Z = 6; beta = 100.3333° V = 4,602.85 Den(Calc)= 1.91
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.79(1), 3.494(0.92), 3.768(0.33),

Physical Properties of Wupatkiite

Help on Cleavage: Cleavage: {012} Distinct
Help on Color: Color: Light pink, Pink.
Help on Density: Density: 1.87 - 1.92, Average = 1.89
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Wupatkiite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2516,KPDmeas= 0.2536,KC= 0.254
Ncalc = 1.48 - 1.49
Help on Optical Data: Optical Data: Biaxial (?), a=1.477, g=1.484, bire=0.0070
Help on Pleochroism (x): Pleochroism (x): pink.
Help on Pleochroism (y): Pleochroism (y): pink.
Help on Pleochroism (z): Pleochroism (z): darker pink.

Calculated Properties of Wupatkiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.98 gm/cc
note: Specific Gravity of Wupatkiite =1.90 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0023281526
Boson Index = 0.9976718474
Help on Photoelectric: Photoelectric: PEWupatkiite = 2.70 barns/electron
U=PEWupatkiite x rElectron Density= 5.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wupatkiite is Not Radioactive

Wupatkiite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.07)where A (B)2 (XO4)4 � x(H2O)
  (29.07.03)Halotrichite Group (Monoclinic with 22 H2O) Pickeringite MgAl2(SO4)4•22(H2O) P 2 2 Halotrichite FeAl2(SO4)4•22(H2O) P 2 2 Apjohnite MnAl2(SO4)4•22(H2O) P 21/c 2/m Dietrichite (Zn,Fe,Mn)Al2(SO4)4•22(H2O) P 21/c 2/m Bilinite FeFe2(SO4)4•22(H2O) P 21/c 2/m Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) Mono Wupatkiite (Co,Mg,Ni)Al2(SO4)4•22(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 07.CB.85 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CB -With only medium-sized cations
07.CB.85 Bilinite FeFe2(SO4)4•22(H2O) P 21/c 2/m
07.CB.85 Apjohnite MnAl2(SO4)4•22(H2O) P 21/c 2/m
07.CB.85 Dietrichite (Zn,Fe,Mn)Al2(SO4)4•22(H2O) P 21/c 2/m
07.CB.85 Halotrichite FeAl2(SO4)4•22(H2O) P 2 2
07.CB.85 Pickeringite MgAl2(SO4)4•22(H2O) P 2 2
07.CB.85 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) Mono
07.CB.85 Wupatkiite (Co,Mg,Ni)Al2(SO4)4•22(H2O) P 21/c 2/m

Other Wupatkiite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(Am.Min.,Vol.81,1996)
Help on See Also: See Also: Links to other databases for Wupatkiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 07.CB.85





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