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Tenorite

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Bust of Michele Tenore
Formula:
CuO
System:
Monoclinic
Colour:
Grey, black
Lustre:
Metallic
Hardness:
Name:
Named after Michele Tenore (1780-1861), Professor of Botany, University of Naples and G. Tenore, President of the Naples Academy (Italy).
This page provides mineralogical data about Tenorite.

Classification of Tenorite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4.AB.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
B : M:O = 1:1 (and up to 1:1.25); with small to medium-sized cations only
Dana 7th ed.:
4.2.3.1
4.2.3.1

4 : SIMPLE OXIDES
2 : AX
7.3.2

7 : Oxides and Hydroxides
3 : Oxides of Cu
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http://www.mindat.org/min-3912.html
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Type Occurrence of Tenorite

Year of Discovery:
1841

Occurrences of Tenorite

Geological Setting:
In the oxidized zone of copper deposits, also as volcanic sublimate.

Physical Properties of Tenorite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Grey, black
Streak:
Black
Hardness (Mohs):
Hardness (Vickers):
VHN100=190 - 300 kg/mm2
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
In zones [011] and [011]
Fracture:
Irregular/Uneven, Conchoidal
Comment:
Flexible and elastic in thin scales.
Density:
6.45 g/cm3 (Measured)    6.515(2) g/cm3 (Calculated)

Crystallography of Tenorite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 4.6837(5) Å, b = 3.4226(5) Å, c = 5.1288(6) Å
β = 99.47°
Ratio:
a:b:c = 1.368 : 1 : 1.499
Unit Cell Volume:
V 80.63 ų
Z:
4
Morphology:
Paper-thin twinned aggregates and laths parallel {100} and elongated [011] (Vesuvius); striated [010] on {100}. Curved plates. Thin shining flexible scales. Stellate groups. Earthy, pulverulent.
Twinning:
1. Common on {011}, producing dovetail reentrants and feather-like forms as seen on {100}; also stellate groups and complex dendritic patterns. 2. On {100} ?

Crystallographic forms of Tenorite

Crystal Atlas:
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Tenorite no.5 - Goldschmidt (1913-1926)
Tenorite no.7 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

Optical Data of Tenorite

Type:
Anisotropic
Anisotropism:
Strong, blue to grey
Bireflectance:
Strong
Colour in reflected light:
light gray with golden tint
Pleochroism:
Weak
Comments:
Distinct, light to dark brown.

Chemical Properties of Tenorite

Formula:
CuO
Essential elements:
All elements listed in formula:
CAS Registry number:
1317-38-0

CAS Registry numbers are published by the American Chemical Society

Relationship of Tenorite to other Species

4.AB.05CredneriteCuMnO2
4.AB.15DelafossiteCuFeO2
4.AB.15McconnelliteCuCrO2
4.AB.20BromelliteBeO
4.AB.20Zincite(Zn,Mn2+,Fe2+)O
4.AB.25BunseniteNiO
4.AB.25LimeCaO
4.AB.25ManganositeMnO
4.AB.25MonteponiteCdO
4.AB.25PericlaseMgO
4.AB.25WüstiteFeO
4.AB.30PalladinitePdO
7.3.1CupriteCu2O
7.3.3ParamelaconiteCu2Cu2O3
7.3.4SpertiniiteCu(OH)2
7.3.5CredneriteCuMnO2
7.3.6DelafossiteCuFeO2
7.3.7CuprospinelCu2+Fe23+O4

Other Names for Tenorite

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Tenorite

Reference List:
Werner (1789), Bergm. Journal (as Kupferschwärze).

Huot (1841): 326 (as Melaconite).

Semmola (1841), Opere Minori, 45, Napoli.

Semmola (1841-42)Bulletin de la Société française de Minéralogie et de Cristallographie: 13: 206.

Scacchi (1842), Distrib. Sist. Min.: 40, Napoli (as Melacosina)

Dana, System of Mineralogy, 5th ed. (1850): 518.

Church (1865), Cem. News: 11: 122.

Story-Maskelyne (1865), British Assoc., Rep.: 35: 33.

Story-Maskelyne (1866), Rss. Min. Ges. Vh.: 1: 147.

Scacchi (1875), Acc. Napoli, Att.: 6(9): 12.

Tunell, Posnjak, and Ksanda (1935), Zs. Kr.: 90: 120.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I: 507-510.

Zeitschrift für Kristallographie (1970): B26: 8.

Internet Links for Tenorite

Localities for Tenorite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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