Michalskiite
A valid IMA mineral species
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About Michalskiite
Steffen Michalski
Formula:
Fe3+1.33Cu2+2(MgFe3+)2(VO4)6
Colour:
Brown-red
Lustre:
Adamantine
Hardness:
3½
Specific Gravity:
3.848 (Calculated)
Crystal System:
Orthorhombic
Name:
Named after Steffen Michalski (b. 1 June 1974) a well-known mineral collector and dealer focused mainly on minerals from Saxony, Germany. He discovered the mineral and provided the holotype specimen.
Isostructural with:
Unique combination of elements.
Unique Identifiers
Mindat ID:
54028
Long-form identifier:
mindat:1:1:54028:5
IMA Classification of Michalskiite
Classification of Michalskiite
8.AB.40
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
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 for Standard |
|---|---|---|
| Mcs | 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 Michalskiite
Adamantine
Transparency:
Transparent
Colour:
Brown-red
Streak:
Light orange
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Very Good
Very good on {001}
Very good on {001}
Comment:
Fracture: Curved
Density:
3.848 g/cm3 (Calculated)
Comment:
Calculated density 3.848 based on the empirical formula; 3.827 for the ideal formula.
Optical Data of Michalskiite
Type:
Biaxial (-)
RI values:
nα = 2.12 nβ = 2.16 nγ = 2.17
2V:
Measured: 49° (1), Calculated: 52.3°
Birefringence:
β – α = 0.04(1) and γ – α = 0.05(1).
Max. Birefringence:
δ = 0.050
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 µm 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 µm 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:
Moderate
Dispersion:
Could not be observed.
Optical Extinction:
X = c
Pleochroism:
Non-pleochroic
Comments:
Refractive indices could not be measured directly. The average index of refraction calculated using the Gladstone-Dale relation is 2.150.
Chemistry of Michalskiite
Mindat Formula:
Fe3+1.33Cu2+2(MgFe3+)2(VO4)6
Element Weights:
Crystallography of Michalskiite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 10.2356(9) Å, b = 17.369(2) Å, c = 4.9406(6) Å
Ratio:
a:b:c = 0.589 : 1 : 0.284
Unit Cell V:
878.35 ų (Calculated from Unit Cell)
Morphology:
Type material:
Striated prisms and needles with rectangular cross-sections. Crystal faces are sometimes rounded, appearing “melted”. Elongated on [001]. No forms were measured, but {100} and {010} are likely.
Striated prisms and needles with rectangular cross-sections. Crystal faces are sometimes rounded, appearing “melted”. Elongated on [001]. No forms were measured, but {100} and {010} are likely.
Comment:
The space group is Pmcn
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.27 Å | (100) |
| 3.20 Å | (20) |
| 2.90 Å | (20) |
| 2.80 Å | (15) |
| 2.74 Å | (40) |
| 2.52 Å | (50) |
| 1.55 Å | (30) |
| 1.42 Å | (25) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45b : [Other oxidized fumarolic minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals |
Type Occurrence of Michalskiite
General Appearance of Type Material:
Striated prisms and needles, up to about 0.2 mm long, with rectangular cross-sections. Crystal faces are sometimes rounded, appearing “melted”.
Place of Conservation of Type Material:
Mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 67614.
Geological Setting of Type Material:
A secondary alteration product probably formed at low temperature under oxidizing conditions.
Associated Minerals at Type Locality:
Other Language Names for Michalskiite
Dutch:Michalskiiet
German:Michalskiit
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+0.5◻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 | Zavalíaite | 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.35 | Stranskiite | Zn2Cu(AsO4)2 |
| 8.AB.40 | Lyonsite | Cu3Fe4(VO4)6 |
Fluorescence of Michalskiite
Not fluorescent.
Other Information
Notes:
Unreactive in concentrated HCl and in concentrated NaOH at room temperature.
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 Michalskiite
mindat.org URL:
https://www.mindat.org/min-54028.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Michalskiite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) - Newsletter 52. European Journal of Mineralogy, 32 (1) 1-11 doi:10.5194/ejm-32-1-2020
Localities for Michalskiite
Showing 1 localities.
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.
Germany (TL) | |
| Miyawaki et al. (2019) +2 other references |
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Lichtenberg Absetzer dump, Kauern, Greiz District, Thuringia, Germany