Utahite Mineral Data

Utahite Mineral Data +

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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.

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:

TriclinicSpace 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

Diaphaniety:

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

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:

r_electron=4.93 gm/cc
note: r_Utahite=5.33 gm/cc.

Fermion Index

Fermion Index = 0.0318
Boson Index = 0.9682

Photoelectric:

PE_Utahite= 125.84 barns/electron
U=PE_Utahite x r_electron= 620.11 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Utahite is Not Radioactive

Utahite Classification

Dana Class:

33.2.8.1 (33)Selenates and Tellurates

(33.2)as A+ (B++)m XO6 Zq · x(H2O) where x can equal 0

(33.2.8)Dana Group

33.2.8.1 Utahite ! Cu5Zn3(TeO4)4(OH)8·7(H2O) P1 or P1 Tri

Strunz Class:

IV/K.15-19 IV - Oxides

IV/K - Complex Tellurides with [TeO6]6-, [TeO3]2- and [TeO4]2- groups

IV/K.15 - Yafsoanite - Cuzticite series

IV/K.15-10 Frankhawthorneite Cu2TeO4(OH)2 P 2₁/n 2/m

IV/K.15-12 Xocomecatlite Cu3TeO4(OH)4 Unk Ortho

IV/K.15-15 Mcalpineite Cu3TeO6·(H2O) Unk Cubic

IV/K.15-16 Jensenite Cu3TeO6·2(H2O) P 2₁/n 2/m

IV/K.15-18 Leisingite! Cu(Mg,Cu,Fe,Zn)2TeO6·6(H2O) P 31m 3 2/m

IV/K.15-19 Utahite Cu5Zn3(TeO4)4(OH)8·7(H2O) P1 or P1 Tri

IV/K.15-20 Cuzticite Fe2TeO6·3(H2O) Unk Hex

IV/K.15-30 Yafsoanite Ca3Te2Zn3O12 I a3d 4/m 3 2/m

IV/K.15-40 Khinite PbCu3TeO6(OH)2 F ddd 2/m 2/m 2/m

IV/K.15-50 Parakhinite Cu3PbTeO4(OH)6 P 6₂22 or P 6₄22 6 2 2

IV/K.15-60 Montanite Bi2TeO6·2(H2O) Mono

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 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 - Mineral and Gemstone Kingdom 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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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: 33.2.8.1 Strunz No: IV/K.15-19
Locality:

Notes: