Garpenbergite
A valid IMA mineral species
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About Garpenbergite
Formula:
Mn6◻AsSbO10(OH)2
Colour:
Blackish to greyish brown
Lustre:
Sub-Adamantine, Greasy
Hardness:
5
Specific Gravity:
4.47 (Calculated)
Crystal System:
Orthorhombic
Name:
For Garpenberg, Sweden, the type locality.
Unique Identifiers
Mindat ID:
55440
Long-form identifier:
mindat:1:1:55440:0
IMA Classification of Garpenbergite
Classification of Garpenbergite
4.BB.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only 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 |
|---|---|---|
| Gpb | 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 Garpenbergite
Sub-Adamantine, Greasy
Transparency:
Translucent
Colour:
Blackish to greyish brown
Comment:
Translucent in thin splinters.
Streak:
Light brown
Hardness:
5 on Mohs scale
Hardness:
VHN100=580 - 694 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {010}
On {010}
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
4.47(1) g/cm3 (Calculated)
Optical Data of Garpenbergite
Anisotropism:
Weak to moderate.
Bireflectance:
None observed.
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 8.93% | 9.50% |
| 420nm | 8.83% | 9.41% |
| 440nm | 8.73% | 9.30% |
| 460nm | 8.68% | 9.23% |
| 470nm | 8.67% | 9.20% |
| 480nm | 8.66% | 9.17% |
| 500nm | 8.65% | 9.17% |
| 520nm | 8.54% | 9.04% |
| 540nm | 8.50% | 9.05% |
| 546nm | 8.49% | 9.04% |
| 560nm | 8.49% | 9.02% |
| 580nm | 8.50% | 8.97% |
| 589nm | 8.47% | 8.96% |
| 600nm | 8.44% | 8.96% |
| 620nm | 8.44% | 8.93% |
| 640nm | 8.47% | 8.88% |
| 650nm | 8.48% | 8.90% |
| 660nm | 8.48% | 8.93% |
| 680nm | 8.46% | 8.91% |
| 700nm | 8.46% | 8.90% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 9.50%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray
Pleochroism:
Not Visible
Comments:
Overall refractive index (n) is calculated to 1.847, using Gladstone-Dale constants.
Chemistry of Garpenbergite
Mindat Formula:
Mn6◻AsSbO10(OH)2
Element Weights:
Crystallography of Garpenbergite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 8.6790(9) Å, b = 18.906(2) Å, c = 6.1066 Å
Ratio:
a:b:c = 0.459 : 1 : 0.323
Unit Cell V:
1,002.00 ų (Calculated from Unit Cell)
Morphology:
Short-prismatic.
Comment:
The space group is Ibbm.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.00 Å | (25) |
| 4.42 Å | (30) |
| 3.48 Å | (20) |
| 3.050 Å | (30) |
| 2.665 Å | (100) |
| 2.616 Å | (40) |
| 2.586 Å | (25) |
| 1.545 Å | (45) |
Type Occurrence of Garpenbergite
General Appearance of Type Material:
Heavily fractured, short-prismatic and mostly subhedral crystals up to 1.5 mm in length.
Place of Conservation of Type Material:
Mineralogical collections of the Department of Geosciences, Swedish Museum of Natural History, Box 50007, 10405 Stockholm, Sweden, collection number GEO-NRM #20010351 and #20200040.
Associated Minerals at Type Locality:
Synonyms of Garpenbergite
Other Language Names for Garpenbergite
Dutch:Garpenbergiet
German:Garpenbergit
Common Associates
Associations Based on Photo Data:
| 3 photos of Garpenbergite associated with Carlfrancisite | Mn2+3(Mn2+,Mg,Fe3+,Al)42[As3+O3]2(As5+O4)4[(Si,As5+)O4]6[(As5+,Si)O4]2(OH)42 |
| 2 photos of Garpenbergite associated with Dolomite | CaMg(CO3)2 |
| 1 photo of Garpenbergite associated with Jacobsite | Mn2+Fe3+2O4 |
| 1 photo of Garpenbergite associated with Alleghanyite | Mn2+5(SiO4)2(OH)2 |
| 1 photo of Garpenbergite associated with Kutnohorite | CaMn2+(CO3)2 |
| 1 photo of Garpenbergite associated with Stibarsen | AsSb |
| 1 photo of Garpenbergite associated with Paradocrasite | Sb2(Sb,As)2 |
Related Minerals - Strunz-mindat Grouping
| 4.BB. | Chenmingite | FeCr2O4 |
| 4.BB. | Thermaerogenite | CuAl2O4 |
| 4.BB. | Chukochenite | LiAl5O8 |
| 4.BB. | Elgoresyite | (Mg5Si2)O9 |
| 4.BB. | Jianmuite | ZrTi4+Ti3+5Al3O16 |
| 4.BB. | Dellagiustaite | V2+Al2O4 |
| 4.BB. | Magnéliite | Ti3+2Ti4+2O7 |
| 4.BB.05 | Qandilite | (Mg,Fe3+)2(Ti,Fe3+,Al)O4 |
| 4.BB.05 | Chromite | Fe2+Cr3+2O4 |
| 4.BB.05 | Filipstadite | (Fe3+0.5Sb5+0.5)Mn2O4 |
| 4.BB.05 | Jacobsite | Mn2+Fe3+2O4 |
| 4.BB.05 | Wernerkrauseite | Ca(Fe3+,Mn3+)2Mn4+O6 |
| 4.BB.05 | Harmunite | CaFe2O4 |
| 4.BB.05 | Zincochromite | ZnCr2O4 |
| 4.BB.05 | Deltalumite | (Al0.67◻0.33)Al2O4 |
| 4.BB.05 | Franklinite | Zn2+Fe3+2O4 |
| 4.BB.05 | Cochromite | CoCr2O4 |
| 4.BB.05 | 'Nichromite' | (Ni,Co,Fe)(Cr,Fe,Al)2O4 |
| 4.BB.05 | Hercynite | Fe2+Al2O4 |
| 4.BB.05 | Gahnite | ZnAl2O4 |
| 4.BB.05 | Galaxite | Mn2+Al2O4 |
| 4.BB.05 | Guite | Co2+Co3+2O4 |
| 4.BB.05 | Coulsonite | Fe2+V3+2O4 |
| 4.BB.05 | Vuorelainenite | Mn2+V3+2O4 |
| 4.BB.05 | Spinel | MgAl2O4 |
| 4.BB.05 | Cuprospinel | Cu2+Fe3+2O4 |
| 4.BB.05 | Manganochromite | Mn2+Cr2O4 |
| 4.BB.05 | Magnesiocoulsonite | MgV2O4 |
| 4.BB.05 | Trevorite | Ni2+Fe3+2O4 |
| 4.BB.05 | Magnesiochromite | MgCr2O4 |
| 4.BB.05 | Magnesioferrite | MgFe3+2O4 |
| 4.BB.05 | Magnetite | Fe2+Fe3+2O4 |
| 4.BB.05 | Ulvöspinel | TiFe2+2O4 |
| 4.BB.10 | Hausmannite | Mn2+Mn3+2O4 |
| 4.BB.10 | Hetaerolite | ZnMn2O4 |
| 4.BB.10 | Manganostibite | (Mn,Fe)7SbAsO12 |
| 4.BB.15 | Titanomaghemite | (Ti4+0.5◻0.5)Fe3+2O4 |
| 4.BB.15 | Maghemite | (Fe3+0.67◻0.33)Fe3+2O4 |
| 4.BB.20 | Tegengrenite | (Mn3+0.5Sb5+0.5)Mg2O4 |
| 4.BB.25 | Xieite | Fe2+Cr2O4 |
| 4.BB.30 | Carmeltazite | ZrAl2Ti4O11 |
| 4.BB.35 | Feiite | Fe2+2(Fe2+Ti4+)O5 |
| 4.BB.40 | Maohokite | MgFe2O4 |
| 4.BB.45 | Tschaunerite | (Fe2+)(Fe2+Ti4+)O4 |
Fluorescence of Garpenbergite
Not fluorescent.
Other Information
Magnetism:
Non-Magnetic
Notes:
Soluble in 30% HCl 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 Garpenbergite
mindat.org URL:
https://www.mindat.org/min-55440.html
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References for Garpenbergite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 61. European Journal of Mineralogy, 33 (3) 299-304 doi:10.5194/ejm-33-299-2021
Localities for Garpenbergite
Showing 2 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.
Sweden | |
| Miyawaki et al. (2021) |
| Holtstam et al. (2022) |
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Garpenberg Norra Mine, Garpenberg, Hedemora, Dalarna County, Sweden