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Chalcocyanite

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Formula:
CuSO4
Colour:
Colourless, light green, brownish, yellowish, sky-blue; colourless in transitted light
Hardness:
Specific Gravity:
3.65
Crystal System:
Orthorhombic
Name:
From the Greek for "copper" and "azure-blue" in allusion to the composition and the property of its turning blue when exposed to moist air.
Soluble in H2O and very hygroscopic, altering to chalcanthite.

Chemically and structurally related to dravertite.


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Classification of ChalcocyaniteHide

Approved, 'Grandfathered' (first described prior to 1959)
7.AB.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
B : With medium-sized cations
28.3.3.1

28 : ANHYDROUS ACID AND NORMAL SULFATES
3 : AXO4
25.2.1

25 : Sulphates
2 : Sulphates of Cu and Ag

Physical Properties of ChalcocyaniteHide

Transparency:
Transparent, Translucent
Colour:
Colourless, light green, brownish, yellowish, sky-blue; colourless in transitted light
Hardness:
3½ on Mohs scale
Density:
3.65(5) g/cm3 (Measured)    3.89 g/cm3 (Calculated)

Optical Data of ChalcocyaniteHide

Type:
Biaxial (-)
RI values:
nα = 1.724(3) nβ = 1.733(3) nγ = 1.739(3)
2V:
Measured: 70° , Calculated: 78°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v medium
Comments:
2V (measured) is large

Chemical Properties of ChalcocyaniteHide

Formula:
CuSO4

Crystallography of ChalcocyaniteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 6.709(1) Å, b = 8.409(1) Å, c = 4.833(1) Å
Ratio:
a:b:c = 0.798 : 1 : 0.575
Unit Cell V:
272.66 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals frequently tabular {010} and slightly elongated [001].

Crystallographic forms of ChalcocyaniteHide

Crystal Atlas:
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Chalcocyanite no.1 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

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Type Occurrence of ChalcocyaniteHide

General Appearance of Type Material:
Sublimates
Geological Setting of Type Material:
Active volcanic fumaroles.
Associated Minerals at Type Locality:

Synonyms of ChalcocyaniteHide

Other Language Names for ChalcocyaniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Dolerophanite17 photos of Chalcocyanite associated with Dolerophanite on mindat.org.
Euchlorine15 photos of Chalcocyanite associated with Euchlorine on mindat.org.
Tenorite11 photos of Chalcocyanite associated with Tenorite on mindat.org.
Fedotovite3 photos of Chalcocyanite associated with Fedotovite on mindat.org.
Chalcanthite2 photos of Chalcocyanite associated with Chalcanthite on mindat.org.
Klyuchevskite2 photos of Chalcocyanite associated with Klyuchevskite on mindat.org.
Eriochalcite2 photos of Chalcocyanite associated with Eriochalcite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

7.AB.DravertiteCuMg(SO4)2Mon. 2/m
7.AB.05MikasaiteFe2(SO4)3Trig. 3 : R3
7.AB.05Millosevichite(Al,Fe)2(SO4)3Tric.
7.AB.10ZinkositeZnSO4Orth.
7.AB.10FerrotelluriteFe(TeO4) (?)

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.2.2BonattiteCuSO4 · 3H2OMon.
25.2.3ChalcanthiteCuSO4 · 5H2OTric. 1 : P1
25.2.4BoothiteCuSO4 · 7H2OMon.
25.2.5DolerophaniteCu2(SO4)OMon. 2/m : B2/m
25.2.6AntleriteCu3(SO4)(OH)4Orth. mmm (2/m 2/m 2/m)
25.2.7BrochantiteCu4(SO4)(OH)6Mon. 2/m : P21/b
25.2.8PosnjakiteCu4(SO4)(OH)6 · H2OMon. m : Pm
25.2.9LangiteCu4(SO4)(OH)6 · 2H2OMon. m
25.2.10WroewolfeiteCu4(SO4)(OH)6 · 2H2OMon. m : Pm
25.2.11KröhnkiteNa2Cu(SO4)2 · 2H2OMon. 2/m : P21/b
25.2.12NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
25.2.13PiypiteK4Cu4O2(SO4)4 · (Na,Cu)ClTet.
25.2.14FedotoviteK2Cu3(SO4)3OMon. 2/m : B2/b
25.2.15CyanochroiteK2Cu(SO4)2 · 6H2OMon. 2/m
25.2.16EuchlorineKNaCu3(SO4)3OMon.
25.2.17DevillineCaCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/b
25.2.18LeightoniteK2Ca2Cu(SO4)4 · 2H2OTric.
25.2.19ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2OMon. 2 : P21
25.2.20CyanotrichiteCu4Al2(SO4)(OH)12 · 2H2OOrth.
25.2.21WoodwarditeCu1-xAlx(OH)2[SO4]x/2 · nH2OTrig. 3m (3 2/m) : R3m
25.2.22CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2OMon.
25.2.23GuilditeCuFe3+(SO4)2(OH) · 4H2OMon.
25.2.24RansomiteCuFe2(SO4)4 · 6H2OMon. 2/m : P21/b
25.2.26KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2Mon.
25.2.27Poitevinite(Cu,Fe,Zn)SO4 · H2OTric.
25.2.28ArgentojarositeAgFe3+3(SO4)2(OH)6Trig. 3m : R3m

Other InformationHide

Notes:
Extremely hygroscopic. Readily soluble in water. Turns blue on exposure and may crumble to a powder of chalcanthite.
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 ChalcocyaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Scacchi (1873) Reale accademia delle scienze fisische e matematiche, Att., Naples: 5: 26 (as Idrociano).
Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 912.
Posnjak and Tunell (1929) American Journal of Science: 18: 27.
Zambonini, Ferruccio (1935) Mineralogia Vesuviana, second edition with Quercigh, 463 pp., Naples: 158.
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. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 429-430.
Wildner, M. and Giester, G. (1988) Crystal structure refinements of synthetic chalcocyanite (CuSO4) and zincosite (ZnSO4). Mineralogy and Petrology: 39: 201-209.
Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2003) Handbook of Mineralogy, Volume V. Borates, Carbonates, Sulfates. Mineral Data Publishing, Tucson, AZ, 813pp.: 129.

Internet Links for ChalcocyaniteHide

Localities for ChalcocyaniteHide

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.
Bulgaria
 
  • Plovdiv Oblast
    • Plovdiv
Atanassova, R. & Kerestedjian, T. (2009): Efflorescent minerals from the metallurgical waste heaps of the KCM non-ferrous metal smelter, Plovdiv, Bulgaria. Geochemistry, Mineralogy and Petrology, 47, 51-63.
Democratic Republic of Congo (Zaïre)
 
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Katanga
Johari, Umba Kyamitala
    • Lake Mweru
Haest, M., Muchez, P., Dewaele, S., Boyce, A.J., von Quadt, A., and Schneider, J. (2009): Mineralium Deposita 44, 505-522.
El Salvador
 
  • Sonsonate Department
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 36
Germany
 
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
Indonesia
 
  • Java (Jawa)
    • Yogyakarta Province
      • Gunung Merapi volcano (Mt Merapi)
Symonds, R. (1993): Scanning electron microscope observations of Merapi Volcano, Indonesia. Geochemical Journal: 26: 337-350
Italy (TL)
 
  • Campania
    • Naples Province
      • 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, 552, 571.
Russia
 
  • Far-Eastern Region
    • Kamchatka Oblast'
      • Tolbachik volcano
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
          • Northern Breakthrough (North Breach)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
            • Second scoria cone
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Lykova, I.S., Belakovskiy, D.I., Vigasina, M.F., Sidorov, E.G., Britvin, S.N., Pushscharovsky, D.Yu. (2015): New zinc and potassium chlorides from fumaroles of the Tolbachik volcano, Kamchatka, Russia: mineral data and crystal chemistry. I. Mellizinkalite, K3Zn2Cl7. European Journal of Mineralogy, 27, 247-253.
Bykova E Y, Berlepsch P, Kartashov P M, Brugger J, Armbruster T, Criddle A J (1998) Vergasovaite Cu3O[(Mo,S)O4][SO4], a new copper-oxy-molybdate-sulfate from Kamchatka, Schweizerische Mineralogische und Petrographische Mitteilungen, 78, 479-488
Belakovskiy, D.I., Chukanov, N.V., Lykova, I.S., Savelyev, D.P., Sidorov, E.G., Pushcharovsky, D.Yu. (2014): Wulffite, K3NaCu4O2(SO4)4, and parawulffite, K5Na3Cu8O4(SO4)8, two new minerals from fumarole sublimates of the Tolbachik Volcano, Kamchatka, Russia. Canadian Mineralogist: 52: 699-716
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
USA
 
  • Nevada
    • White Pine Co.
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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