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Paramelaconite

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Formula:
Cu2Cu2O3
System:
Tetragonal
Colour:
Black, black with a ...
Hardness:
Name:
Named by George Augustus Koenig in 1891 from the Greek παρά (para), near, and melaconite, because it is near "melaconite" (= tenorite) in composition.
This page provides mineralogical data about Paramelaconite.

Classification of Paramelaconite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4.AA.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
A : Cation:Anion (M:O) = 2:1 (and 1.8:1)
4.6.4.1

4 : SIMPLE OXIDES
6 : Miscellaneous
7.3.3

7 : Oxides and Hydroxides
3 : Oxides of Cu
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Type Occurrence of Paramelaconite

Year of Discovery:
1891
Geological Setting of Type Material:
Oxidized zone of copper sulfide deposit
Associated Minerals at Type Locality:

Physical Properties of Paramelaconite

Sub-Adamantine, Greasy, Sub-Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Black, black with a slight purple tint
Streak:
Brown-black
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.9 - 6.04 g/cm3 (Measured)    6.106 g/cm3 (Calculated)

Crystallography of Paramelaconite

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/amd
Cell Parameters:
a = 5.83Å, c = 9.88Å
Ratio:
a:c = 1 : 1.695
Unit Cell Volume:
V 335.81 ų (Calculated from Unit Cell)
Morphology:
massive, rarely as stout prismatic [001] and {010} striated [100] crystals.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.17 (100)
2.92 (40)
2.48 (10)
1.89 (20)
1.88 (10)
1.73 (20)
1.59 (10)
1.54 (10)
Comments:
ICDD 33-480

Optical Data of Paramelaconite

Type:
Anisotropic
Anisotropism:
Strong
Colour in reflected light:
White with pinkish brown tint.
Pleochroism:
Weak

Chemical Properties of Paramelaconite

Formula:
Cu2Cu2O3
Essential elements:
All elements listed in formula:

Relationship of Paramelaconite to other Species

7.3.1CupriteCu2O
7.3.2TenoriteCuO
7.3.4SpertiniiteCu(OH)2
7.3.5CredneriteCuMnO2
7.3.6DelafossiteCuFeO2
7.3.7CuprospinelCu2+Fe23+O4

Other Names for Paramelaconite

Name in Other Languages:

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 Paramelaconite

Reference List:
Koenig (1891), Academy of Natural Sciences Philadelphia, Proceedings: 284.

Frondel, C. (1941), American Mineralogist: 26: 657-672.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 510-511.

American Mineralogist (1978): 63: 180-185.

Internet Links for Paramelaconite

Localities for Paramelaconite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • New South Wales
    • Yancowinna Co.
      • Broken Hill District
        • Northern Section
          • Silverton
Alan Melbourne
Cyprus
 
  • Nicosia District (Lefkoşa District; Lefkosia District)
    • Skouriotissa
American Mineralogist (1975): 60: 1013-1018.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
No reference listed
        • Plaka
          • Plaka Mines
No reference listed
No reference listed
UK
 
  • England
    • Devon
      • East Devon
        • Budleigh Salterton
Technical Report TR-02-09 (March 2002) Alteration of uraniferous and native copper concretions in the Permian mudrocks of south Devon, United Kingdom - A E Milodowski et al
USA
 
  • Arizona
    • Cochise Co.
      • Mule Mts
        • Warren District
[MinRec 24:421]
            • Queen Hill
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 183; Koenig, G.A. (1891), On paramelaconite and the associated minerals, Proc. Acad. Nat. Sci. Phila: 284-291; O'Keefe, M. & J.O. Bovin (1978), The crystal structure of paramelaconite, Cu4O3, Am.Min.: 63: 180-185; Frondel, C. (1941), Paramelaconite: A tetragonal oxide of copper, Am.Min.: 26: 567-672; Min. Rec.:12(5):309; Dana 6:1093; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 27.
Dana 6:1093.
  • Michigan
    • Ontonagon Co.
      • Mass City
Rocks & Min.:58:112.; 79:124-5
        • Mass Consolidated Mine
Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Mineral and/or Locality  
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