Garpenbergite (original) (raw)

A valid IMA mineral species

About GarpenbergiteHide

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Colour:

Blackish to greyish brown

Lustre:

Sub-Adamantine, Greasy

Specific Gravity:

4.47 (Calculated)

Crystal System:

Orthorhombic

Name:

For Garpenberg, Sweden, the type locality.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:55440:0

e0feb6ac-d539-4d36-a98f-58a91c23a4c5

IMA Classification of GarpenbergiteHide

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IMA Formula:

Mn6AsSbO10(OH)2

Classification of GarpenbergiteHide

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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

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of GarpenbergiteHide

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Colour:

Blackish to greyish brown

Comment:

Translucent in thin splinters.

Hardness:

VHN100=580 - 694 kg/mm2 - Vickers

Cleavage:

Distinct/Good
On {010}

Fracture:

Irregular/Uneven, Sub-Conchoidal

Density:

4.47(1) g/cm3 (Calculated)

Optical Data of GarpenbergiteHide

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Anisotropism:

Weak to moderate.

Bireflectance:

None observed.

Reflectivity:

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 9.50%.
R1 shown in black, R2 shown in red

Colour in reflected light:

Gray

Comments:

Overall refractive index (n) is calculated to 1.847, using Gladstone-Dale constants.

Chemistry of GarpenbergiteHide

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Mindat Formula:

Mn6◻AsSbO10(OH)2

Crystallography of GarpenbergiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/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 DiffractionHide

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Powder Diffraction Data:

Type Occurrence of GarpenbergiteHide

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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 GarpenbergiteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of GarpenbergiteHide

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Other InformationHide

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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 GarpenbergiteHide

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References for GarpenbergiteHide

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Reference List:

Holtstam, Dan, Bindi, Luca, Förster, Hans-Jürgen, Karlsson, Andreas, Gatedal, Kjell (2022) Garpenbergite, Mn6□As5+Sb5+O10(OH)2, a new mineral related to manganostibite, from the Garpenberg Zn–Pb–Ag deposit, Sweden. Mineralogical Magazine, 86 (1) 1-8 doi:10.1180/mgm.2022.6

Localities for GarpenbergiteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.