Cyanochroite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Cyanochroite
Formula:
K2Cu(SO4)2 · 6H2O
Colour:
Greenish-blue
Lustre:
Vitreous
Hardness:
2 - 2½
Specific Gravity:
2.224
Crystal System:
Monoclinic
Member of:
Name:
From the Greek κυανός for "blue" and χρώσις for "colouring", in allusion to the color.
Unique Identifiers
Mindat ID:
1200
Long-form identifier:
mindat:1:1:1200:9
GUID
(UUID V4):
(UUID V4):
a062a200-7861-466a-b952-498adcc9ec7d
IMA Classification of Cyanochroite
Approved, 'Grandfathered' (first described prior to 1959)
Type description reference:
Classification of Cyanochroite
7.CC.60
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
29.3.6.2
29 : HYDRATED ACID AND NORMAL SULFATES
3 : A2B(XO4)2·xH2O
29 : HYDRATED ACID AND NORMAL SULFATES
3 : A2B(XO4)2·xH2O
25.2.15
25 : Sulphates
2 : Sulphates of Cu and Ag
25 : Sulphates
2 : Sulphates of Cu and Ag
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Cyc | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Cyanochroite
Vitreous
Transparency:
Transparent
Colour:
Greenish-blue
Hardness:
2 - 2½ on Mohs scale
Cleavage:
Perfect
{201}, perfect.
{201}, perfect.
Density:
2.224 g/cm3 (Measured) 2.23 g/cm3 (Calculated)
Comment:
Measured on artificial material.
Optical Data of Cyanochroite
Type:
Biaxial (+)
RI values:
nα = 1.484 nβ = 1.486 nγ = 1.502
2V:
Measured: 46° , Calculated: 48°
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v to r < v strong
Chemistry of Cyanochroite
Mindat Formula:
K2Cu(SO4)2 · 6H2O
Crystallography of Cyanochroite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 9.09 Å, b = 12.14 Å, c = 6.18 Å
β = 104.47°
β = 104.47°
Ratio:
a:b:c = 0.749 : 1 : 0.509
Unit Cell V:
660.35 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals tabular {001}. CVrystalline crusts.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0004780 | Cyanochroite | Bosi F, Belardi G, Ballirano P (2009) Structural features in Tutton's salts K2[M2+(H2O)6](SO4)2, with M2+= Mg, Fe, Co, Ni, Cu, and Zn American Mineralogist 94 74-82 | 2009 | synthetic | 0 | 293 | |
0012326 | Cyanochroite | Robinson D J, Kennard C H L (1972) Potassium hexa-aquacopper(II) sulfate, CuH12K2O14S2 (neutron) Crystal Structure Communications 1 185-188 | 1972 | synthetic | 0 | 293 | |
0019590 | Cyanochroite | Carapezza M, Di Sanseverino L R (1968) Crystallography and genesis of double sulfates and their hydrates. II. Structure, powder pattern and thermoanalysis of cyanochroite, K2Cu(SO4)2*6H2O Mineralogica Petrographica Acta 14 23-37 | 1968 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.673 Å | (100) |
4.179 Å | (90) |
4.057 Å | (79) |
2.975 Å | (65) |
2.377 Å | (45) |
2.816 Å | (42) |
2.993 Å | (39) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
25 : Evaporites (prebiotic) | |
Stage 7: Great Oxidation Event | <2.4 |
45a : [Sulfates, arsenates, selenates, antimonates] | |
45b : [Other oxidized fumarolic minerals] | |
47a : [Near-surface hydration of prior minerals] | |
47b : [Sulfates and sulfites] | |
Stage 10b: Anthropogenic minerals | <10 Ka |
55 : Anthropogenic mine minerals | |
56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Cyanochroite
Place of Conservation of Type Material:
Natural History Museum, Paris, France, 175.358.
Geological Setting of Type Material:
Active volcanic fumaroles.
Reference:
Scacchi (1855) Memoria sullo Incendio Vesuviano: 191.
Synonyms of Cyanochroite
Other Language Names for Cyanochroite
Relationship of Cyanochroite to other Species
Member of:
Other Members of this group:
Boussingaultite | (NH4)2Mg(SO4)2 · 6H2O | Mon. 2/m : P21/b |
Katerinopoulosite | (NH4)2Zn(SO4)2 · 6H2O | Mon. 2/m : P21/b |
Mohrite | (NH4)2Fe(SO4)2 · 6H2O | Mon. 2/m : P21/b |
Nickelboussingaultite | (NH4)2Ni(SO4)2 · 6H2O | Mon. 2/m : P21/b |
Nickelpicromerite | K2Ni(SO4)2 · 6H2O | Mon. 2/m : P21/b |
Picromerite | K2Mg(SO4)2 · 6H2O | Mon. 2/m : P2/b |
Related Minerals - Strunz-mindat Grouping
7.CC. | Cobaltoblödite | Na2Co(SO4)2 · 4H2O |
7.CC. | Andychristyite | PbCu2+Te6+O5(H2O) |
7.CC. | Ammoniovoltaite | (NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18 |
7.CC.05 | Krausite | KFe(SO4)2 · H2O |
7.CC.10 | Tamarugite | NaAl(SO4)2 · 6H2O |
7.CC.15 | Kalinite | KAl(SO4)2 · 11H2O |
7.CC.15 | Mendozite | NaAl(SO4)2 · 11H2O |
7.CC.20 | Lonecreekite | (NH4)Fe3+(SO4)2 · 12H2O |
7.CC.20 | Alum-(K) | KAl(SO4)2 · 12H2O |
7.CC.20 | Alum-(Na) | NaAl(SO4)2 · 12H2O |
7.CC.20 | Tschermigite | (NH4)Al(SO4)2 · 12H2O |
7.CC.20 | Lanmuchangite | Tl+Al(SO4)2 · 12H2O |
7.CC.25 | Voltaite | K2Fe2+5Fe3+3Al(SO4)12 · 18H2O |
7.CC.25 | Zincovoltaite | K2Zn5Fe3+3Al(SO4)12 · 18H2O |
7.CC.25 | Pertlikite | K2(Fe2+,Mg)2Mg4Fe3+2Al(SO4)12 · 18H2O |
7.CC.25 | Ammoniomagnesiovoltaite | (NH4)2Mg2+5Fe3+3Al(SO4)12 · 18H2O |
7.CC.25 | Magnesiovoltaite | K2Mg5Fe3+3Al(SO4)12 · 18H2O |
7.CC.30 | Kröhnkite | Na2Cu(SO4)2 · 2H2O |
7.CC.35 | Ferrinatrite | Na3Fe(SO4)3 · 3H2O |
7.CC.40 | Goldichite | KFe(SO4)2 · 4H2O |
7.CC.45 | Löweite | Na12Mg7(SO4)13 · 15H2O |
7.CC.50 | Blödite | Na2Mg(SO4)2 · 4H2O |
7.CC.50 | Nickelblödite | Na2(Ni,Mg)(SO4)2 · 4H2O |
7.CC.50 | Changoite | Na2Zn(SO4)2 · 4H2O |
7.CC.55 | Leonite | K2Mg(SO4)2 · 4H2O |
7.CC.55 | Mereiterite | K2Fe(SO4)2 · 4H2O |
7.CC.60 | Boussingaultite | (NH4)2Mg(SO4)2 · 6H2O |
7.CC.60 | Mohrite | (NH4)2Fe(SO4)2 · 6H2O |
7.CC.60 | Nickelboussingaultite | (NH4)2Ni(SO4)2 · 6H2O |
7.CC.60 | Picromerite | K2Mg(SO4)2 · 6H2O |
7.CC.60 | Nickelpicromerite | K2Ni(SO4)2 · 6H2O |
7.CC.60 | Katerinopoulosite | (NH4)2Zn(SO4)2 · 6H2O |
7.CC.65 | Polyhalite | K2Ca2Mg(SO4)4 · 2H2O |
7.CC.70 | Leightonite | K2Ca2Cu(SO4)4 · 2H2O |
7.CC.75 | Amarillite | NaFe(SO4)2 · 6H2O |
7.CC.80 | Konyaite | Na2Mg(SO4)2 · 5H2O |
7.CC.85 | Wattevilleite | Na2Ca(SO4)2 · 4H2O (?) |
7.CC.85 | Xocolatlite | Ca2Mn4+2(Te6+O6)2 · H2O |
7.CC.90 | Eckhardite | (Ca,Pb)Cu2+Te6+O5(H2O) |
Other Information
Special Storage/
Display Requirements:
Display Requirements:
Water soluble
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Cyanochroite
mindat.org URL:
https://www.mindat.org/min-1200.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Cyanochroite
Reference List:
Localities for Cyanochroite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Canada | |
| TRAILL (1983) |
Costa Rica | |
| Ulloa et al. (2018) |
Greece | |
| 42. +2 other references |
Italy (TL) | |
| Russo +1 other reference |
Pelloux (1927) +1 other reference | |
Poland | |
| Cu +2 other references |
Russia | |
| Pavel.M. Kartashov (n.d.) +1 other reference |
Pekov et al. (2012) | |
| Sharygin et al. (2018) |
Quick NavTopAbout CyanochroiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsStrunz-MindatOther InformationInternet Links References Localities Locality List
Yadovitaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia