Utahite Mineral Data

General Utahite Information

Chemical Formula:

Cu5Zn3(Te++++++O4)4(OH)8•7(H2O)

Composition:

Molecular Weight = 1,542.46 gm

Zinc 12.72 % Zn 15.83 % ZnO

Copper 20.60 % Cu 25.79 % CuO

Tellurium 33.09 % Te 41.39 % TeO₂

Hydrogen 1.44 % H 12.85 % H₂O

Oxygen 32.16 % O

______ ______

100.00 % 95.85 % = TOTAL OXIDE

Empirical Formula:

Cu₅Zn₃(TeO₄)₄(OH)₈•7(H₂O)

Environment:

An extremely rare secondary Cu-Te mineral found as a product of oxidation.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

The Centennial Eureka mine, 1 mile southeast of Eureka, Tintic District, Juab County, Utah, USA. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Utahite

Synonym:

IMA1995-039

Utahite Image

Images:

Utahite

Comments: Blue utahite grain in matrix.
Location: Centennial Eureka Mine, Tintic District (East Tintic Mountains), Juab Co., Utah, USA. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Utahite Crystallography

Axial Ratios:

a:b:c =0.8797:1:0.5662

Cell Dimensions:

a = 8.794, b = 9.996, c = 5.66, Z = 1; alpha = 104.1°, beta = 90.066°, gamma = 96.3333° V = 479.61 Den(Calc)= 5.34

Crystal System:

Triclinic Space Group: P1 or P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 4.841(1), 9.638(1), 2.747(0.6),8.736(0.5),

Physical Properties of Utahite

Cleavage:

None

Color:

Pale blue, Greenish blue.

Density:

5.33

Diaphaneity:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

4-5 - Fluorite-Apatite

Luster:

Vitreous - Adamantine

Streak:

pale blue

Optical Properties of Utahite

Gladstone-Dale:

CI meas= 0.172 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.174 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1617,KPDmeas= 0.162,KC= 0.1957
Ncalc = 2.04 - 2.05

Optical Data:

Biaxial (?), a=1.83-1.84, b=1.83-1.9, g=1.88-1.9, bire=0.0500-0.0600

RL Bireflectance:

Slight.

RL Color:

Pale brown with green internal reflections.

RL Pleochroism:

None.

Calculated Properties of Utahite

Electron Density:

Bulk Density (Electron Density)=4.93 gm/cc
note: Specific Gravity of Utahite =5.33 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Utahite= 125.84 barns/electron
U=PE_Utahite x rElectron Density= 620.11 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Utahite is Not Radioactive

Utahite Classification

Dana Class:

33.02.08.01 (33)Selenates and Tellurates

(33.02)as A+ (B++)m XO6 Zq ï¿½ x(H2O) where x can equal 0

(33.02.08)Dana Group

33.02.08.01 Utahite! Cu5Zn3(TeO4)4(OH)8•7(H2O) P1 or P1 Tri

Strunz Class:

07.DE.25 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DE -With only medium-sized cations; unclassified

07.DE.25 Utahite! Cu5Zn3(TeO4)4(OH)8•7(H2O) P1 or P1 Tri

Other Utahite Information

References:

NAME( MinRec, Vol. 28, No. 3) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(Eur. J. Min.,Vol.8,1996)

See Also:

Links to other databases for Utahite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Utahite Specimen Label here :

Utahite

Cu5Zn3(Te++++++O4)4(OH)8•7(H2O)
Dana No: 33.02.08.01 Strunz No: 07.DE.25
Locality:

Notes:

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