Stranskiite
A valid IMA mineral species
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About Stranskiite
Ivan Nikolov Stranski
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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References for Stranskiite
Reference List:
Localities for Stranskiite
symbol to view information about a locality.
The 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).
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