Markascherite
A valid IMA mineral species
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About Markascherite
Mark Ascher
Formula:
Cu3(MoO4)(OH)4
Colour:
Green
Lustre:
Sub-Adamantine
Hardness:
3½ - 4
Specific Gravity:
4.216 (Calculated)
Crystal System:
Monoclinic
Name:
The mineral is named after its finder, Mark Goldberg Ascher, a mineral collector and engineer in Tucson, Arizona, USA.
Type Locality:
Dimorph of:
Unique Identifiers
Mindat ID:
41105
Long-form identifier:
mindat:1:1:41105:3
IMA Classification of Markascherite
Classification of Markascherite
7.GB.70
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O
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 |
|---|---|---|
| Mac | 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 Markascherite
Sub-Adamantine
Transparency:
Transparent
Colour:
Green
Streak:
Green
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on {100}
on {100}
Density:
4.216 g/cm3 (Calculated)
Optical Data of Markascherite
Type:
Biaxial (-)
Dispersion:
Strong, r > v.
Comments:
All the refractive indices > 1.8.
Chemistry of Markascherite
Mindat Formula:
Cu3(MoO4)(OH)4
Element Weights:
Elements listed:
Crystallography of Markascherite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 9.9904(6) Å, b = 5.9934(4) Å, c = 5.5255(4) Å
β = 97.428(4)°
β = 97.428(4)°
Ratio:
a:b:c = 1.667 : 1 : 0.922
Unit Cell V:
328.04 ų
Z:
2
Morphology:
The dominant forms are {001}, {100}, and {010}.
Twinning:
Twinning is found with the twofold twin axis along [101].
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0018649 | Markascherite | Yang H, Jenkins R A, Thompson R M, Downs R T, Evans S H, Bloch E M (2012) Markascherite, Cu3(MoO4)(OH)4, a new mineral species polymorphic with szenicsite, from Copper Creek, Pinal County, Arizona, U.S.A. American Mineralogist 97 197-202 | 2012 | Copper Creek, Pinal County, Arizona, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.124 Å | (65) |
| 4.948 Å | (100) |
| 3.450 Å | (54) |
| 3.299 Å | (51) |
| 3.006 Å | (53) |
| 2.736 Å | (55) |
| 2.580 Å | (88) |
| 2.122 Å | (60) |
Comments:
Calculated data.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Markascherite
General Appearance of Type Material:
Crystals are bladed (elongated along the b axis), up to 0.50 x 0.10 x 0.05 mm.
Place of Conservation of Type Material:
A part of the cotype sample has been deposited at the University of Arizona Mineral Museum (catalog 19291) and a part is in the RRUFF Project (deposition R100030).
Geological Setting of Type Material:
The mineral is of secondary origin from the breakdown of primary molybdenite, bornite, chalcocite, and chalcopyrite.
Associated Minerals at Type Locality:
Synonyms of Markascherite
Other Language Names for Markascherite
Dutch:Markascheriet
German:Markascherit
Common Associates
Related Minerals - Strunz-mindat Grouping
| 7.GB. | Stunorthropite | (NH4)4[Mo2O6(MoO4)2] |
| 7.GB. | Wangpuite | K3(PO4)(Mo12O36) |
| 7.GB. | Alexearlite | Hg3(MoO4)S2 |
| 7.GB. | Ootannite | Th4+2W6+4O16 · 5H2O |
| 7.GB. | Natromolybdite | Na2MoO4 · 2H2O |
| 7.GB. | Marsaalamite-(Y) | Y(MoO4)(OH) |
| 7.GB.05 | Lindgrenite | Cu3(MoO4)2(OH)2 |
| 7.GB.10 | Szenicsite | Cu3(MoO4)(OH)4 |
| 7.GB.15 | UM1999-38-WO:CrV | (V, Cr, W, O, H) [V:Cr:W ratio about 2:1:3] |
| 7.GB.15 | Huenite | Cu4(MoO4)3(OH)2 |
| 7.GB.15 | Cuprotungstite | Cu2(WO4)(OH)2 |
| 7.GB.20 | Phyllotungstite | (H2O,M)x(W,Fe)(O,OH)3 · yH2O (M = Ca, Cs, Pb or K) |
| 7.GB.25 | Rankachite | Ca0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2O |
| 7.GB.30 | Ferrimolybdite | Fe2(MoO4)3 · nH2O |
| 7.GB.35 | Mpororoite | WAlO3(OH)3 · 2(H2O) |
| 7.GB.35 | Anthoinite | AlWO3(OH)3 |
| 7.GB.40 | Obradovicite-KCu | [K2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3] |
| 7.GB.45 | Paramendozavilite | [KAl4(H2O)30][Mo12P6Fe3+6O60(OH)13] |
| 7.GB.45 | Mendozavilite-NaFe | [Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe3+3O35(OH)2] |
| 7.GB.45 | Obradovicite-NaCu | Na2(H2O)17Cu(H2O)6][Mo8As2Fe3+3O34(OH)3] |
| 7.GB.45 | Obradovicite-NaNa | [Na2(H2O)16Na(H2O)6][Mo8As2Fe3+3O33(OH)4] |
| 7.GB.50 | Tancaite-(Ce) | FeCe(MoO4)3 · 3H2O |
| 7.GB.50 | Mendozavilite-NaCu | [Na2(H2O)15Cu(H2O)6][Mo8P2Fe3+3O34(OH)3] |
| 7.GB.50 | Mendozavilite-KCa | [K2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O34(OH)3] |
| 7.GB.60 | Peterandresenite | Mn4Nb6O19 · 14H2O |
| 7.GB.60 | Hansesmarkite | Ca2Mn2Nb6O19 · 20H2O |
| 7.GB.60 | Melcherite | Ba2Na2Mg[Nb6O19] · 6H2O |
| 7.GB.65 | Ichnusaite | Th(MoO4)2 · 3H2O |
| 7.GB.75 | Nuragheite | Th(MoO4)2 · H2O |
| 7.GB.80 | Ophirite | Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2] · 46H2O |
Other Information
Notes:
Insoluble in water, acetone, or hydrochloric acid.
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 Markascherite
mindat.org URL:
https://www.mindat.org/min-41105.html
Please feel free to link to this page.
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References for Markascherite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2010, CNMNC Newsletter No 7. Mineralogical Magazine, 75 (1) 27-31 doi:10.1180/minmag.2011.075.1.27
Localities for Markascherite
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.
France | |
| Breuer et al. (01/2024) |
| Breuer et al. (01/2024) | |
USA (TL) | |
| Williams et al. (2011) +1 other reference |
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Château-Lambert, Mélisey, Lure, Haute-Saône, Bourgogne-Franche-Comté, France