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This page provides mineralogical data about Fersmanite.
Classification of Fersmanite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||8/C.0-50|
|Nickel-Strunz 10th (pending) edition ID:||9.BE.72|
9 : SILICATES (Germanates)
B : Sorosilicates
E : Si2O7 groups, with additional anions; cations in octahedral  and greater coordination
|Dana 8th edition ID:||188.8.131.52|
56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in  and/or > coordination
|Hey's CIM Ref.:||17.8.6|
17 : Silicates Containing other Anions
8 : Silicates with niobate or tantalate
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Type Occurrence of Fersmanite
|Type Locality:||Vein No. 1 of Labuntsov, 3rd left tributary of Vuonnemijok river, Eveslogchorr Mt, Khibiny Massif, Kola peninsula, Murmanskaja oblast', Northern Region, Russia|
|Year of Discovery:||1929|
Physical Properties of Fersmanite
Crystallography of Fersmanite
|Cell Parameters:||a = 7.21Å, b = 7.21Å, c = 20.45Å|
α = 95.15°, β = 95.6°, γ = 89.04°
|Ratio:||a:b:c = 1 : 1 : 2.836|
|Unit Cell Volume:||V 1,053.70 Å³ (Calculated from Unit Cell)|
Optical Data of Fersmanite
|RI values:||nα = 1.873 - 1.886 nβ = 1.914 - 1.930 nγ = 1.914 - 1.939|
|Maximum Birefringence:||δ = 0.041 - 0.053|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Surface Relief:||Very High|
Chemical Properties of Fersmanite
|Essential elements:||Ca, F, Na, O, Si, Ti|
|All elements listed in formula:||Ca, F, Na, Nb, O, Si, Ti|
Relationship of Fersmanite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Fersmanite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Fersmanite
American Mineralogist (1931): 16: 92.
Doklady Akademii Nauk SSSR Seriya A (1929): (12): 297-301.
Canadian Mineralogist: 15: 87-91.
Kristallografiya: 29: 56-59.
Soviet Physics – Crystallography: 29: 31-33.
Internet Links for Fersmanite
Localities for Fersmanite
The 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.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Cold Valley, Bad Harzburg, Harz, Lower Saxony, GermanyFrom Frank K. Mazdab, 10th Dec 2013 08:40:40