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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 (1897â1979), 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
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 IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Ssk | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC 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
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r << v
Chemistry of Stranskiite
Mindat Formula:
Zn2Cu(AsO4)2
Element Weights:
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 Ă
Âł (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
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) |
|---|---|---|---|---|---|---|---|
| 0010699 | Stranskiite | Calvo C, Leung K Y (1969) Refinement of the structure of stranskiite Zeitschrift fur Kristallographie 130 231-233 |  | 1969 | 0 | 293 | |
| 0010632 | Stranskiite | Plieth K, Sanger G (1967) Die struktur des stranskiits Zn2Cu(AsO4)2 Zeitschrift fur Kristallographie 124 91-100 | | 1967 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.134 Ă | (100) |
| 2.788 Ă | (80) |
| 2.506 Ă | (60) |
| 4.154 Ă | (30) |
| 2.601 Ă | (30) |
| 6.250 Ă | (20) |
| 4.690 Ă | (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 fĂŒr Mineralogie und Kristallographie, Technische UniversitĂ€t, 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
Associations Based on Photo Data:
| 3 photos 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. | Kryzaite | Na4(MgCr)(PO4)3 |
| 8.AB. | Niasite | Ni2+4.5(AsO4)3 |
| 8.AB. | Johanngeorgenstadtite | Ni2+4.5(AsO4)3 |
| 8.AB. | Rodolicoite | Fe3+PO4 |
| 8.AB. | Karwowskiite | Ca9Mg(Fe2+0.5â»0.5)(PO4)7 |
| 8.AB. | Olsenite | KFe4(PO4)3 |
| 8.AB. | Borisenkoite | Cu3[(V,As)O4]2 |
| 8.AB.05 | Farringtonite | Mg3(PO4)2 |
| 8.AB.10 | Natrophilite | NaMn2+PO4 |
| 8.AB.10 | 'Sicklerite' | Li1-x(Mn3+xMn2+1-x)PO4 |
| 8.AB.10 | Simferite | LiMg(PO4) |
| 8.AB.10 | Heterosite | Fe3+(PO4) |
| 8.AB.10 | Lithiophilite | LiMn2+PO4 |
| 8.AB.10 | Karenwebberite | NaFe2+PO4 |
| 8.AB.10 | Triphylite | LiFe2+PO4 |
| 8.AB.10 | 'Ferrisicklerite' | Li1-x(Fe3+xFe2+1-x)PO4 |
| 8.AB.10 | Purpurite | Mn3+(PO4) |
| 8.AB.15 | ZavalĂaite | Mn2+3(PO4)2 |
| 8.AB.15 | Chopinite | Mg3(PO4)2 |
| 8.AB.15 | Sarcopside | Fe2+3(PO4)2 |
| 8.AB.20 | Beusite | Mn2+Mn2+2 (PO4)2 |
| 8.AB.20 | Graftonite-(Ca) | CaFe2+2(PO4)2 |
| 8.AB.20 | Graftonite-(Mn) | MnFe2+2(PO4)2 |
| 8.AB.20 | Graftonite | Fe2+Fe2+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 | Michalskiite | Fe3+1.33Cu2+2(MgFe3+)2(VO4)6 |
| 8.AB.40 | Lyonsite | Cu3Fe4(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
Please feel free to link to this page.
Please feel free to link to this page.
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References for Stranskiite
Reference List:
Plieth, K.; SĂ€nger, G. (1965) Zur Kristallstruktur des Stranskiits Zn2Cu(AsO4)2. Die Naturwissenschaften, 52 (9). 206 doi:10.1007/bf00626460
Plieth, K.; SĂ€nger, G. (1967) Die Struktur des Stranskiits Zn2Cu(AsO4)2. Zeitschrift fĂŒr Kristallographie, 124 (1-2). 91-100 doi:10.1524/zkri.1967.124.1-2.91
Calvo, C.; Leung, K. Y. (1969) Refinement of the structure of stranskiite. Zeitschrift fĂŒr Kristallographie, 130 (1-6). 231-233 doi:10.1524/zkri.1969.130.1-6.231
HĂ€nni, Henry A., Stern, Willem B., Glor, Martin (1978) New data on stranskiite from Tsumeb, Southwest Africa. American Mineralogist, 63 (1-2) 213-215
Localities for Stranskiite
Showing 8 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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 | |
| Ashley et al. (1999) |
Austria | |
| Schnorrer et al. (2005) |
| Schnorrer+Poeverlein (2005) | |
Germany | |
| Bender et al. (1994) +1 other reference |
| Wittern (2001) |
| Der Aufschluss Vol.55 |
Namibia (TL) | |
| Strunz (1960) +3 other references |
Tajikistan | |
| King (n.d.) |
Quick NavTopAbout StranskiiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia