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Chalcocyanite

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Formula:
CuSO4
System:
Orthorhombic
Colour:
Colourless, light green, ...
Hardness:
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.

Classification of Chalcocyanite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
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
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First Recorded Occurrence of Chalcocyanite

General Appearance of First Recorded Material:
Sublimates
Year of Discovery:
1868
Geological Setting of First Recorded Material:
Active volcanic fumaroles.
Associated Minerals at First Recorded Locality:

Occurrences of Chalcocyanite

Geological Setting:
Sublimates near volcanic fumaroles.

Physical Properties of Chalcocyanite

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

Crystallography of Chalcocyanite

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 Volume:
V 272.66 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals frequently tabular {010} and slightly elongated [001].

Crystallographic forms of Chalcocyanite

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

Toggle
Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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

Optical Data of Chalcocyanite

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 Chalcocyanite

Formula:
CuSO4
Essential elements:
All elements listed in formula:
Analytical Data:
Very hygroscopic. Readily soluble in water.

Relationship of Chalcocyanite to other Species

7.AB.05MikasaiteFe2(SO4)3
7.AB.05Millosevichite(Al,Fe)2(SO4)3
7.AB.10ZinkositeZnSO4
7.AB.10FerrotelluriteFe(TeO4) (?)
25.2.2BonattiteCuSO4 · 3H2O
25.2.3ChalcanthiteCuSO4 · 5H2O
25.2.4BoothiteCuSO4 · 7H2O
25.2.5DolerophaniteCu2(SO4)O
25.2.6AntleriteCu3(SO4)(OH)4
25.2.7BrochantiteCu4(SO4)(OH)6
25.2.8PosnjakiteCu4(SO4)(OH)6 · H2O
25.2.9LangiteCu4(SO4)(OH)6 · 2H2O
25.2.10WroewolfeiteCu4(SO4)(OH)6 · 2H2O
25.2.11KröhnkiteNa2Cu(SO4)2 · 2H2O
25.2.12NatrochalciteNaCu2(SO4)2(OH) · 2H2O
25.2.13PiypiteK2Cu2(SO4)2O
25.2.14FedotoviteK2Cu3(SO4)3O
25.2.15CyanochroiteK2Cu(SO4)2 · 6H2O
25.2.16EuchlorineKNaCu3(SO4)3O
25.2.17DevillineCaCu4(SO4)2(OH)6 · 3H2O
25.2.18LeightoniteK2Ca2Cu(SO4)4 · 2H2O
25.2.19ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
25.2.20CyanotrichiteCu4Al2(SO4)(OH)12 · 2H2O
25.2.21WoodwarditeCu1-xAlx(OH)2[SO4]x/2 · nH2O
25.2.22CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2O
25.2.23GuilditeCuFe3+(SO4)2(OH) · 4H2O
25.2.24RansomiteCuFe2(SO4)4 · 6H2O
25.2.26KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2
25.2.27Poitevinite(Cu,Fe,Zn)SO4 · H2O
25.2.28ArgentojarositeAgFe33+(SO4)2(OH)6

Other Names for Chalcocyanite

Other Information

Other Information:
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 Chalcocyanite

Reference List:
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 Chalcocyanite

Localities for Chalcocyanite

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.
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
Italy
 
  • 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
  • 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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