Jensenite Mineral Data

General Jensenite Information

Chemical Formula:

Cu++3Te++++++O6•2(H2O)

Composition:

Molecular Weight = 450.26 gm

Copper 42.34 % Cu 53.00 % CuO

Tellurium 28.34 % Te 35.45 % TeO₂

Hydrogen 0.90 % H 8.00 % H₂O

Oxygen 28.43 % O

______ ______

100.00 % 96.45 % = TOTAL OXIDE

Empirical Formula:

Cu₃TeO₆•2(H₂O)

Environment:

Secondary alteration of Cu and Te ore minerals.

IMA Status:

Approved IMA 1996

Locality:

The dumps of the Centennial Eureka mine, Tintic district, Juab County, Utah, USA. Link to MinDat.org Location Data.

Name Origin:

For Mr. Matin C. Jensen (1959-), who first collected and recognized this mineral as a potentially new species.

Name Pronunciation:

Jensenite + Pronunciation

Synonym:

ICSD 82481

IMA1994-043

PDF 49-1874

Jensenite Image

Images:

Jensenite

Comments: Small green crystals of jensenite in matrix.
Location: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Jensenite Crystallography

Axial Ratios:

a:b:c =1.0037:1:0.827

Cell Dimensions:

a = 9.204, b = 9.17, c = 7.584, Z = 4; beta = 102° V = 626.11 Den(Calc)= 4.78

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 6.428(1), 3.217(0.7), 2.6(0.6),

Crystal Structure:

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drag2 - RMB Resize/Rotate
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Help on Above

Grice J D , Groat L A , Roberts A C , The Canadian Mineralogist , 34 (1996) p.55-59, Jensenite, a cupric tellurate framework structure with two coordinations of, copper

Physical Properties of Jensenite

Cleavage:

{101} Fair

Color:

Emerald green.

Density:

4.76

Diaphaneity:

Transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.

Habit:

Pseudo Rhombohedral - Crystals show a rhombohedral outline.

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Hardness:

3-4 - Calcite-Fluorite

Luminescence:

Non-fluorescent.

Luster:

Adamantine

Streak:

emerald green

Optical Properties of Jensenite

Gladstone-Dale:

CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1925,KPDmeas= 0.1933,KC= 0.1886
Ncalc = 1.9

Optical Data:

Biaxial (?), a=1.92

RL Bireflectance:

Weak.

RL Color:

Gray with bright green internal reflections at grain boundaries.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Jensenite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
420 nm	11.00	11.30
440 nm	10.80	11.20
460 nm	10.70	11.10
480 nm	10.70	11.00
500 nm	10.70	10.80
520 nm	10.60	10.70
540 nm	10.40	10.50
560 nm	10.15	10.30
580 nm	9.90	10.00
600 nm	9.60	9.80
620 nm	9.40	9.60
640 nm	9.25	9.40
660 nm	9.15	9.30
680 nm	9.00	9.20
700 nm	9.10	9.20

**Calculated Relative Intensity Colors of Jensenite in Air**
Relative Intensity	0%	100%	200%	300%	400%	500%	600%	700%	800%	900%	920%
R₁
R₂

Calculated Properties of Jensenite

Electron Density:

Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Jensenite =4.78 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Jensenite= 114.00 barns/electron
U=PE_Jensenite x rElectron Density= 501.01 barns/cc.

Radioactivity:

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

Jensenite Classification

Dana Class:

33.02.06.01 (33)Selenates and Tellurates

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

(33.02.06)Dana Group

33.02.06.01 Jensenite Cu3TeO6•2(H2O) P 2₁/n 2/m

33.02.06.02 Brumadoite! Cu3(TeO4)(OH)4•5H2O P 2₁/m or P 2₁ Mono

Strunz Class:

04.FL.60 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FL -Hydroxides with H2O ± (OH); sheets of edge-sharing octahedra

04.FL.60 Jensenite Cu3TeO6•2(H2O) P 2₁/n 2/m

Other Jensenite Information

References:

NAME( MinRec) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(AntBidBlaNic5)

See Also:

Links to other databases for Jensenite :
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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Ask about Jensenite here :
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Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Jensenite

Cu++3Te++++++O6•2(H2O)
Dana No: 33.02.06.01 Strunz No: 04.FL.60
Locality:

Notes: