Stranskiite
A valid IMA mineral species
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About Stranskiite
Formula:
Zn2Cu(AsO4)2
Colour:
Cyan-blue
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
5.23 - 5.3
Crystal System:
Triclinic
Name:
Honoring Professor Iwan Nikolow Stranski (1897–1979), German chemist and physicist, Berlin, Germany. Stranski did groundbreaking work on crystal growth.
This page provides mineralogical data about Stranskiite.
Unique Identifiers
Mindat ID:
3798
Long-form identifier:
mindat:1:1:3798:9
GUID
(UUID V4):
(UUID V4):
5b872012-7271-4f45-b9e3-78678a01bca0
IMA Classification of Stranskiite
Classification of Stranskiite
8.AB.35
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
Dana 7th ed.:
38.3.7.1
38.3.7.1
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
3 : (AB)3(XO4)2
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
3 : (AB)3(XO4)2
20.3.7
20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg
20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg
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 |
---|---|---|
Ssk | 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 Stranskiite
Vitreous
Transparency:
Transparent
Colour:
Cyan-blue
Hardness:
4 on Mohs scale
Cleavage:
Distinct/Good
Good on {010}, indistinct on {100}, {001}, {101}.
Good on {010}, indistinct on {100}, {001}, {101}.
Density:
5.23 - 5.3 g/cm3 (Measured) 5.05(5) g/cm3 (Calculated)
Optical Data of Stranskiite
Type:
Biaxial (-)
RI values:
nα = 1.795 nβ = 1.842 nγ = 1.874
2V:
Measured: 80° , Calculated: 76°
Max Birefringence:
δ = 0.079
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:
Very High
Dispersion:
r << v
Chemistry of Stranskiite
Mindat Formula:
Zn2Cu(AsO4)2
Elements listed:
Crystallography of Stranskiite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.07 Å, b = 6.66 Å, c = 5.26 Å
α = 109.85°, β = 112.14°, γ = 86.88°
α = 109.85°, β = 112.14°, γ = 86.88°
Ratio:
a:b:c = 0.761 : 1 : 0.79
Unit Cell V:
154.19 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Tabular crystals in radiating aggregates and massive.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
---|---|---|---|---|---|---|---|
0010632 | Stranskiite | Plieth K, Sanger G (1967) Die struktur des stranskiits Zn2Cu(AsO4)2 Zeitschrift fur Kristallographie 124 91-100 | 1967 | 0 | 293 | ||
0010699 | Stranskiite | Calvo C, Leung K Y (1969) Refinement of the structure of stranskiite Zeitschrift fur Kristallographie 130 231-233 | 1969 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.134 Å | (100) |
2.788 Å | (80) |
2.506 Å | (60) |
4.154 Å | (30) |
2.601 Å | (30) |
6.250 Å | (20) |
4.690 Å | (20) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Stranskiite
General Appearance of Type Material:
Radiating aggregates on chalcocite.
Place of Conservation of Type Material:
Institut für Mineralogie und Kristallographie, Technische Universität, Berlin, Germany, numbers 86/63, 86/64, 88/14.
Geological Setting of Type Material:
Oxidation zone of dolostone hosted hydrothermal metal deposit.
Associated Minerals at Type Locality:
Other Language Names for Stranskiite
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Stranskiite associated with Leiteite | Zn(As2O4) |
1 photo of Stranskiite associated with O'Danielite | Na(Zn,Mg)3(AsO4)(AsO3OH)2 |
Related Minerals - Strunz-mindat Grouping
8.AB. | Rodolicoite | Fe3+PO4 |
8.AB. | Johanngeorgenstadtite | Ni2+4.5(AsO4)3 |
8.AB. | Borisenkoite | Cu3[(V,As)O4]2 |
8.AB. | Niasite | Ni2+4.5(AsO4)3 |
8.AB. | Olsenite | KFe4(PO4)3 |
8.AB.05 | Farringtonite | Mg3(PO4)2 |
8.AB.10 | Ferrisicklerite | Li1-x(Fe3+xFe2+1-x)PO4 |
8.AB.10 | Heterosite | (Fe3+,Mn3+)PO4 |
8.AB.10 | Lithiophilite | LiMn2+PO4 |
8.AB.10 | Natrophilite | NaMn2+PO4 |
8.AB.10 | Purpurite | Mn3+(PO4) |
8.AB.10 | Sicklerite | Li1-x(Mn3+xMn2+1-x)PO4 |
8.AB.10 | Simferite | LiMg(PO4) |
8.AB.10 | Triphylite | LiFe2+PO4 |
8.AB.10 | Karenwebberite | NaFe2+PO4 |
8.AB.15 | Sarcopside | (Fe2+,Mn2+,Mg)3(PO4)2 |
8.AB.15 | Chopinite | (Mg,Fe2+)3(PO4)2 |
8.AB.15 | Zavalíaite | (Mn2+,Fe2+,Mg)3(PO4)2 |
8.AB.20 | Beusite | Mn2+Mn2+2 (PO4)2 |
8.AB.20 | Graftonite | Fe2+Fe2+2(PO4)2 |
8.AB.20 | Graftonite-(Ca) | CaFe2+2(PO4)2 |
8.AB.20 | Graftonite-(Mn) | MnFe2+2(PO4)2 |
8.AB.20 | Beusite-(Ca) | CaMn2+2(PO4)2 |
8.AB.25 | Xanthiosite | Ni3(AsO4)2 |
8.AB.30 | Lammerite | Cu3(AsO4)2 |
8.AB.30 | Paralammerite | Cu3(AsO4)2 |
8.AB.35 | Mcbirneyite | Cu3(VO4)2 |
8.AB.35 | Pseudolyonsite | Cu3(VO4)2 |
8.AB.40 | Lyonsite | Cu3Fe4(VO4)6 |
8.AB.40 | Michalskiite | Fe3+1.33Cu2+2(MgFe3+)2(VO4)6 |
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.
Internet Links for Stranskiite
mindat.org URL:
https://www.mindat.org/min-3798.html
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Please feel free to link to this page.
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References for Stranskiite
Reference List:
Localities for Stranskiite
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.
Australia | |
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Austria | |
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Germany | |
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Namibia (TL) | |
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Tajikistan | |
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Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia