Mineralogy Database

Jensenite Mineral Data

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General Jensenite Information

Help on Chemical  Formula: Chemical Formula: Cu++3Te++++++O6•2(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Cu3TeO6•2(H2O)
Help on Environment: Environment: Secondary alteration of Cu and Te ore minerals.
Help on IMA Status: IMA Status: Approved IMA 1996
Help on Locality: Locality: The dumps of the Centennial Eureka mine, Tintic district, Juab County, Utah, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Mr. Matin C. Jensen (1959-), who first collected and recognized this mineral as a potentially new species.
Help on Name Pronunciation: Name Pronunciation: Jensenite + Pronunciation Say JENSENITE
Help on Synonym: Synonym: ICSD 82481
  PDF 49-1874

Jensenite Image

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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

Help on Axial Ratios: Axial Ratios: a:b:c =1.0037:1:0.827
Help on Cell Dimensions: Cell Dimensions: a = 9.204, b = 9.17, c = 7.584, Z = 4; beta = 102° V = 626.11 Den(Calc)= 4.78
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.428(1), 3.217(0.7), 2.6(0.6),

Physical Properties of Jensenite

Help on Cleavage: Cleavage: {101} Fair
Help on Color: Color: Emerald green.
Help on Density: Density: 4.76
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.
Help on Habit: Habit: Pseudo Rhombohedral - Crystals show a rhombohedral outline.
Help on Habit: Habit: Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: emerald green

Optical Properties of Jensenite

Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Biaxial (?), a=1.92
Help on RL Bireflectance: RL Bireflectance: Weak.
Help on RL Color: RL Color: Gray with bright green internal reflections at grain boundaries.
Help on Reflectivity 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
   0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 920%

Calculated Properties of Jensenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Jensenite =4.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEJensenite = 114.00 barns/electron
U=PEJensenite x rElectron Density= 501.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jensenite is Not Radioactive

Jensenite Classification

Help on  Dana Class: Dana Class: (33)Selenates and Tellurates
  (33.02)as A+ (B++)m XO6 Zq � x(H2O) where x can equal 0
  (33.02.06)Dana Group Jensenite Cu3TeO6•2(H2O) P 21/n 2/m Brumadoite! Cu3(TeO4)(OH)4•5H2O P 21/m or P 21 Mono
Help on  Strunz Class: 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

Help on References: References: NAME( MinRec) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(AntBidBlaNic5)
Help on See Also: 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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Dana No: Strunz No: 04.FL.60





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