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Melanothallite

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About MelanothalliteHide

Formula:
Cu2Cl2O
Colour:
Black, bluish black
Crystal System:
Orthorhombic
Name:
From the Greek for "black" and a "young shoot," for the mineral’s property of turning green on exposure.
This page provides mineralogical data about Melanothallite.


Classification of MelanothalliteHide

Approved, 'Grandfathered' (first described prior to 1959)
3.DA.05

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
A : With Cu, etc., without Pb
10.4.4.1

10 : OXYHALIDES AND HYDROXYHALIDES
4 : A2(O,OH)Xq
8.2.7

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
2 : Halides of Cu

Physical Properties of MelanothalliteHide

Colour:
Black, bluish black
Comment:
Changes to green colours upon exposure.

Chemical Properties of MelanothalliteHide

Formula:
Cu2Cl2O
IMA Formula:
Cu2OCl2

Crystallography of MelanothalliteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 9.59 Å, b = 9.69 Å, c = 7.46 Å
Ratio:
a:b:c = 0.99 : 1 : 0.77
Unit Cell V:
693.24 ų (Calculated from Unit Cell)

Type Occurrence of MelanothalliteHide

Synonyms of MelanothalliteHide

Other Language Names for MelanothalliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Melanothallite associated with EuchlorineKNaCu3(SO4)3O
3 photos of Melanothallite associated with KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2
2 photos of Melanothallite associated with ChloromeniteCu9(SeO3)4O2Cl6

Related Minerals - Nickel-Strunz GroupingHide

3.DA.CentennialiteCaCu3Cl2(OH)6 · nH2O (n ~ 0.7)Trig. 3m (3 2/m) : P3m1
3.DA.10aAtacamiteCu2(OH)3ClOrth. mmm (2/m 2/m 2/m) : Pnma
3.DA.10bBotallackiteCu2(OH)3ClMon. 2/m : P21/m
3.DA.10bClinoatacamiteCu2(OH)3ClMon. 2/m
3.DA.10aHibbingiteFe2+2(OH)3ClOrth.
3.DA.10aKempiteMn2+2(OH)3ClOrth. mmm (2/m 2/m 2/m) : Pnma
3.DA.10cParatacamiteCu3(Cu,Zn)(OH)6Cl2Trig. 3m (3 2/m)
3.DA.10bBelloiteCu(OH)ClMon. 2/m : P21/b
3.DA.10cHerbertsmithiteCu3Zn(OH)6Cl2Trig. 3m (3 2/m) : R3m
3.DA.10cKapellasiteCu3Zn(OH)6Cl2Trig. 3m (3 2/m) : P3m1
3.DA.10cGillarditeCu3Ni(OH)6Cl2Trig. 3m (3 2/m) : R3m
3.DA.10cHaydeeiteCu3Mg(OH)6Cl2Trig. 3m (3 2/m) : P3m1
3.DA.15ClaringbulliteCu4ClF(OH)6Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.DA.15BarlowiteCu4BrF(OH)6Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.DA.20SimonkolleiteZn5Cl2(OH)8 · H2OTrig. 3m (3 2/m) : P3m1
3.DA.25ButtgenbachiteCu19(NO3)2(OH)32Cl4 · 2H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.DA.25ConnelliteCu19(SO4)(OH)32Cl4 · 3H2OHex. 6 m2 : P62c
3.DA.30AbhuriteSn21Cl16(OH)14O6Trig.
3.DA.35PonomareviteK4Cu4Cl10OMon.
3.DA.40AnthonyiteCu(OH,Cl)2 · 3H2OMon. 2/m
3.DA.40CalumetiteCaCu4(OH)8Cl2·3.5H2OOrth.
3.DA.45KhaidarkaniteNa0.34Cu4Al3(OH)14F3 · 2H2OMon.
3.DA.50BobkingiteCu5Cl2(OH)8 · 2H2OMon. 2/m : B2/m
3.DA.55AvdoniniteK2Cu5(OH)4Cl8 · H2OMon. 2/m
3.DA.60DroninoiteNi6Fe2+3(OH)16Cl2 · 4H2OTrig. 3m (3 2/m) : R3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.2.1NantokiteCuClIso. 4 3m : F4 3m
8.2.2TolbachiteCuCl2Mon.
8.2.3EriochalciteCuCl2 · 2H2OOrth. mmm (2/m 2/m 2/m)
8.2.4AtacamiteCu2(OH)3ClOrth. mmm (2/m 2/m 2/m) : Pnma
8.2.5ParatacamiteCu3(Cu,Zn)(OH)6Cl2Trig. 3m (3 2/m)
8.2.6BotallackiteCu2(OH)3ClMon. 2/m : P21/m
8.2.8CalumetiteCaCu4(OH)8Cl2·3.5H2OOrth.
8.2.9AnthonyiteCu(OH,Cl)2 · 3H2OMon. 2/m
8.2.10ClaringbulliteCu4ClF(OH)6Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.2.11MarshiteCuIIso. 4 3m : F4 3m
8.2.12MitscherlichiteK2CuCl4 · 2H2OTet. 4/mmm (4/m 2/m 2/m)
8.2.13PonomareviteK4Cu4Cl10OMon.

Other InformationHide

Notes:
Soluble in water. Changes to a green, more highl;y hydrated substance (hydromelanothallite) upon exposure.
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 MelanothalliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Scacchi, A. (1870) Reale accademia delle scienze fisische e matematiche, Naples, Rend.: 9: 86.
Scacchi (1884) Reale accademia delle scienze fisische e matematiche, Naples, Rend.: 10: 158.
Zambonini, Ferruccio (1935) Mineralogia Vesuviana. second edition with Quercigh, 463 pp., Naples: 111-112.
Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 44.
American Mineralogist (1983): 68: 852.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 111: 562-565.

Internet Links for MelanothalliteHide

Localities for MelanothalliteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Iran
 
  • Sistan and Baluchestan
    • Bazman Volcano
Ali Sholeh, Ebrahim Rastad, David Huston, J. Bruce Gemmell and Ryan D. Taylor (2016): The Chahnaly Low-Sulfidation Epithermal Gold Deposit, Western Makran Volcanic Arc, Southeast Iran. Economic Geology 111, 619-639.
Italy (TL)
 
  • Campania
    • Naples
      • Somma-Vesuvius Complex
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 429, 571.
Russia
 
  • Kamchatka Krai
    • Tolbachik volcano
      • Great Fissure eruption (Main Fracture)
        • Northern Breakthrough (North Breach)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. V., Zubkova, N. V., Zelenski, M. E., Yapaskurt, V. O., Polekhovsky, Y. S., Fadeeva, O. A., & Pushcharovsky, D. Y. (2013). Yaroshevskite, Cu9O2 (VO4) 4Cl2, a new mineral from the Tolbachik volcano, Kamchatka, Russia. Mineralogical Magazine, 77(1), 107-116.
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Chukanov, N. V., Murashko, M. N., Zadov, A. E., & Bushmakin, A. F. (2007). Avdoninite, K 2 Cu 5 Cl 8 (OH) 4· H 2 O, a new mineral species from volcanic exhalations and the technogenic zone at volcanic-hosted massive sulfide deposits. Geology of Ore Deposits, 49(7), 505-508.
 
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