Vargite
A valid IMA mineral species
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About Vargite
Formula:
MnCu2Mn2(AsO4)2(OH)4(H2O)4
Colour:
Bright green
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.49 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
It is named after Erik Gustaf Varg (1886–1970), who worked as an ore picker at the Långban mines most of his life. He collected and sold numerous Långban specimens (about 3000) to the Swedish Museum of Natural History over the period 1924–1960.
Unique Identifiers
Mindat ID:
55229
Long-form identifier:
mindat:1:1:55229:9
IMA Classification of Vargite
Approved
Approval year:
2020
Classification of Vargite
8.DD.
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
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 |
|---|---|---|
| Vg | 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 Vargite
Vitreous
Transparency:
Transparent
Colour:
Bright green
Streak:
White
Hardness:
3 on Mohs scale
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
Distinct/Good
In analogy with other isotypic arsenates, cleavage ought to be a good parallel to {010}
In analogy with other isotypic arsenates, cleavage ought to be a good parallel to {010}
Density:
3.49(1) g/cm3 (Calculated)
Optical Data of Vargite
Type:
Biaxial (+)
Comments:
Average n calculated from Gladstone-Dale constants is 1.74.
The optical character is presumed to be biaxial (+) from comparison with isotypic arsenates.
The optical character is presumed to be biaxial (+) from comparison with isotypic arsenates.
Chemistry of Vargite
Mindat Formula:
MnCu2Mn2(AsO4)2(OH)4(H2O)4
Element Weights:
Crystallography of Vargite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 5.625(1) Å, b = 17.452(5) Å, c = 6.905(2) Å
β = 100.21(5)°
β = 100.21(5)°
Ratio:
a:b:c = 0.322 : 1 : 0.396
Unit Cell V:
667.11 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.726 Å | (100) |
| 4.558 Å | (20) |
| 4.419 Å | (50) |
| 4.363 Å | (46) |
| 3.106 Å | (33) |
| 2.774 Å | (35) |
| 2.691 Å | (28) |
| 2.345 Å | (25) |
Reference:
Comments:
From Type Description.
Type Occurrence of Vargite
General Appearance of Type Material:
spherical crystal aggregates up to 0.5 mm across, consisting of hundreds of small individual lath-shaped crystals, elongated along [100] and with ridge-like terminations. The size of the individual crystals is on average 0.20 × 0.02 × 0.01 mm.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Department of Geosciences, Swedish Museum of Natural History, Box 50007, SE-10405 Stockholm, Sweden, collection number GEO-NRM 19370307
Geological Setting of Type Material:
marble-hosted Fe-Mn oxide deposits
Associated Minerals at Type Locality:
Synonyms of Vargite
Other Language Names for Vargite
Relationship of Vargite to other Species
Member of:
Related Minerals - Strunz-mindat Grouping
| 8.DD. | Penberthycroftite | [Al6(AsO4)3(OH)9(H2O)5] · 8H2O |
| 8.DD. | Bettertonite | [Al6(AsO4)3(OH)9(H2O)5] · 11H2O |
| 8.DD. | Galeaclolusite | Al6(AsO4)3(OH)9(H2O)4 · 8H2O |
| 8.DD.05 | Luetheite | Cu2Al2(AsO4)2(OH)4 |
| 8.DD.05 | Chenevixite | Cu2Fe3+2(AsO4)2(OH)4 |
| 8.DD.10 | Akrochordite | MnMn2Mn2(AsO4)2(OH)4(H2O)4 |
| 8.DD.10 | Guanacoite | MgCu2Mg2(AsO4)2(OH)4(H2O)4 |
| 8.DD.15 | UM1981-32-PO:FeH | Fe2+Fe3+6(PO4)4-x[PO3(OH)]x(OH)8 · 4H2O |
| 8.DD.15 | Afmite | Al3(OH)4(H2O)3(PO4)(PO3OH) · H2O |
| 8.DD.15 | Aheylite | (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | Coeruleolactite | |
| 8.DD.15 | Faustite | ZnAl6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | Planerite | Al6(PO4)2(PO3OH)2(OH)8 · 4H2O |
| 8.DD.15 | Chalcosiderite | CuFe3+6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| 8.DD.20 | Eosphorite | Mn2+Al(PO4)(OH)2 · H2O |
| 8.DD.20 | Ernstite | (Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O |
| 8.DD.20 | Lefontite | Fe2Al2Be(PO4)2(OH)6 |
| 8.DD.20 | Childrenite | Fe2+Al(PO4)(OH)2 · H2O |
| 8.DD.25 | Kobokoboite | Al6(PO4)4(OH)6 · 11H2O |
| 8.DD.30 | Smamite | Ca2Sb(OH)4[H(AsO4)2] · 6H2O |
| 8.DD.35 | Gutsevichite | Al3(PO4)2(OH)3 · 8H2O |
| 8.DD.40 | Laubmannite (of Moore) | (Fe3+,Fe2+,M)8+x(OH,H2O)9(H2O)2(PO4)5, M = Fe3+, Cu2+ or other metal cation, x ~ 0.1. |
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 Vargite
mindat.org URL:
https://www.mindat.org/min-55229.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Vargite
Localities for Vargite
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.
Sweden (TL) | |
| Miyawaki et al. (2020) +1 other reference |
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Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden