Gjerdingenite-Mn (original) (raw)

A valid IMA mineral species

About Gjerdingenite-MnHide

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Formula:

K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O

Colour:

Pale yellowish to tan

Specific Gravity:

2.93 (Calculated)

Crystal System:

Monoclinic

Name:

For the type locality and the dominant cation (Mn) in the D site of the structure, according to the labuntsovite group nomenclature.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:26442:8

4588f327-f93a-4670-8d11-4489ab6ffd8a

IMA Classification of Gjerdingenite-MnHide

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IMA Formula:

K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O

Type description reference:

Raade, Gunnar, Chukanov, Nikita V., Kolitsch, Uwe, Möckel, Steffen, Zadov, Aleksandr E., Pekov, Igor V. (2004) Gjerdingenite-Mn from Norway a new mineral species in the labuntsovite group: descriptive data and crystal structure. European Journal of Mineralogy, 16 (6) 979-987 doi:10.1127/0935-1221/2004/0016-0979

Classification of Gjerdingenite-MnHide

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9.CE.30c

9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions

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 Gjerdingenite-MnHide

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Colour:

Pale yellowish to tan

Fracture:

Irregular/Uneven

Density:

2.93 g/cm3 (Calculated)

Optical Data of Gjerdingenite-MnHide

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RI values:

_n_α = 1.670(2) _n_β = 1.685(2) _n_γ = 1.775(5)

2V:

Measured: 52° (8), Calculated: 46°

δ = 0.105

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Optical Extinction:

Z = a, Y = b

Comments:

Y = yellowish brown; X = Z = colorless

Chemistry of Gjerdingenite-MnHide

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Mindat Formula:

K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O

Crystallography of Gjerdingenite-MnHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 14.563 Å, b = 13.961 Å, c = 7.851 Å
α = 117.62°

Ratio:

a:b:c = 1.043 : 1 : 0.562

Morphology:

Prismatic on [010]; with forms {001}, {100}, {201} and {021}.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of Gjerdingenite-MnHide

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General Appearance of Type Material:

Rod-like crystals and groups.

Place of Conservation of Type Material:

Freiberg University, Freiberg, Germany. Inventory number 80250.

Geological Setting of Type Material:

In miarolitic cavities in a permian sodic granite (ekerite).

Associated Minerals at Type Locality:

Reference:

Raade, G., Chukanov N.V., Kolitsch U., Möckel S., Zadov, A.E., Pekov I.V. (2004): Gjerdingenite-Mn from Norway - a new mineral species in the labuntsovite group: descriptive data and crystal structure. European Journal of Mineralogy, 16: 979-987

Synonyms of Gjerdingenite-MnHide

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Other Language Names for Gjerdingenite-MnHide

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Relationship of Gjerdingenite-Mn to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of Gjerdingenite-MnHide

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Other InformationHide

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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 Gjerdingenite-MnHide

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References for Gjerdingenite-MnHide

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Reference List:

Raade, Gunnar, Chukanov, Nikita V., Kolitsch, Uwe, Möckel, Steffen, Zadov, Aleksandr E., Pekov, Igor V. (2004) Gjerdingenite-Mn from Norway a new mineral species in the labuntsovite group: descriptive data and crystal structure. European Journal of Mineralogy, 16 (6) 979-987 doi:10.1127/0935-1221/2004/0016-0979

Localities for Gjerdingenite-MnHide

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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.