Tenorite Mineral Data

Tenorite Mineral Data +

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General Tenorite Information

Chemical Formula:

CuO

Composition:

Molecular Weight = 79.55 gm

Copper 79.89 % Cu 100.00 % CuO

Oxygen 20.11 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CuO

Environment:

Secondary copper mineral.

IMA Status:

Valid Species (Pre-IMA) 1841

Locality:

Vesuvio (Vesuvius), Napoli, Campania, Italy Link to MinDat.org Location Data.

Name Origin:

Named after the Italian botanist, M. Tenor (1781-1861).

Synonym:

Black Copper Oxide

ICSD 67850

Melaconite

Melanochalcite

PDF 45-937

Tenorite Image

Images:

Tenorite Chrysocolla

Comments: Lustrous black botryoidal Tenorite mostly covering a sky-blue massive chrysocolla matrix.
Location: 79 mine, Banner district, Pinal Co., Arizona. Scale: 5.5 x 3 cm.
© Dan Weinrich

Tenorite Crystallography

Axial Ratios:

a:b:c =1.3585:1:1.4975

Cell Dimensions:

a = 4.653, b = 3.425, c = 5.129, Z = 4; beta = 99.467° V = 80.63 Den(Calc)= 6.55

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 2.52(1), 2.32(0.96), 2.53(0.49),

Crystal Structure:

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I - Data Info
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Wyckoff R W G , Crystal Structures , 1 (1963) p.85-237, Second edition. Interscience Publishers, New York, New York

Physical Properties of Tenorite

Cleavage:

None

Color:

Black, Steel gray.

Density:

6.5

Diaphaniety:

Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Scaly - Morphology like fish scales.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luminescence:

None.

Luster:

Earthy (Dull)

Magnetism:

Nonmagnetic

Streak:

black

Optical Properties of Tenorite

Optical Data:

Biaxial (?)

NCalc= 2.11 - from Gladstone-Dale relationship (KC = 0.17) where Ncalc=Dcalc*KC+1
NCalc= 2.1 - from Gladstone-Dale relationship (KC = 0.17) where Ncalc=Dmeas*KC+1

Pleochroism (x):

light brown.

Pleochroism (z):

dark brown.

RL Anisotrophism:

Strong, blue to gray.

RL Bireflectance:

Strong.

RL Color:

Light gray with a golden tint.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Tenorite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	22.80	29.60
420 nm	21.90	30.00
440 nm	21.00	30.40
460 nm	20.40	30.60
480 nm	20.10	30.80
500 nm	19.80	30.70
520 nm	19.70	30.40
540 nm	19.60	30.20
560 nm	19.50	29.80
580 nm	19.50	29.60
600 nm	19.40	29.40
620 nm	19.40	29.20
640 nm	19.40	29.10
660 nm	19.40	28.80
680 nm	19.30	28.60
700 nm	19.30	28.20

**Calculated Relative Intensity Colors of Tenorite in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	450%
R₁
R₂

Calculated Properties of Tenorite

Electron Density:

r_electron=6.09 gm/cc
note: r_Tenorite=6.55 gm/cc.

Fermion Index

Fermion Index = 0.00009
Boson Index = 0.99991

Photoelectric:

PE_Tenorite= 36.14 barns/electron
U=PE_Tenorite x r_electron= 220.18 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tenorite is Not Radioactive

Tenorite Classification

Dana Class:

4.2.3.1 (4)Simple Oxides

(4.2)with a cation charge of 2+ (A++ O)

(4.2.3)Dana Group

4.2.3.1 Tenorite CuO C 2/c 2/m

Strunz Class:

IV/A.05-10 IV - Oxides

IV/A - Oxides with metal : oxygen = 1:1 and 2:1 (M2O,MO)

IV/A.05 - Periclase Group, Tenorite - Crednerite series

IV/A.05-10 Tenorite CuO C 2/c 2/m

IV/A.05-20 Paramelaconite Cu2Cu2O3 I 4₁/amd 4/m 2/m 2/m

IV/A.05-30 Delafossite CuFeO2 R 3m 3 2/m

IV/A.05-40 Mcconnellite CuCrO2 R 3m 3 2/m

IV/A.05-50 Crednerite CuMnO2 A2/m 2/m

Other Tenorite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

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Tenorite

CuO
Dana No: 4.2.3.1 Strunz No: IV/A.05-10
Locality:

Notes: