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Gregori Aminoff
Colorless to light yellowish.
5½ - 6
Crystal System:
To honor Dr. Gregori Aminoff (1883-1947), Swedish mineralogist and expert on Långban mineralogy, associated with the Swedish Museum of Natural History (Naturhistoriska Riksmuseet) Stockholm, Sweden.
This page provides mineralogical data about Aminoffite.

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Classification of AminoffiteHide

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
B : Sorosilicates
H : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in tetrahedral [4] and greater coordination

57 : SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
1 : Insular Si3O10 and Larger Noncyclic Groups with [Si3O10] groups

16 : Silicates Containing Aluminum and other Metals
6 : Aluminosilicates of Be

Physical Properties of AminoffiteHide

Colorless to light yellowish.
5½ - 6 on Mohs scale
Poor on {001}

Optical Data of AminoffiteHide

Uniaxial (-)
RI values:
nω = 1.647 nε = 1.637
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of AminoffiteHide

IMA Formula:
Common Impurities:

Crystallography of AminoffiteHide

Crystal System:
Cell Parameters:
a = 9.8 Å, c = 9.91 Å
a:c = 1 : 1.011
Unit Cell V:
951.76 ų (Calculated from Unit Cell)
As small, euhedral, pyramidal crystals, to 1 mm. Forms: simple tetragonal bipyramids {l11} trunctated by the basal{001} face.
Commonly twinned, polysynthetically on {001}.

Type Occurrence of AminoffiteHide

General Appearance of Type Material:
Well-formed crystals in veins and cavities in massive magnetite and limonite
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, 94627, 106916, 106917; National Museum of Natural History, Washington, D.C., USA, 137291, R7823; The Natural History Museum, London, England, 1984,423.
Associated Minerals at Type Locality:

Other Language Names for AminoffiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite2 photos of Aminoffite associated with Calcite on

Related Minerals - Nickel-Strunz GroupingHide

9.BH.10KinoiteCa2Cu2(H2O)2[Si3O10]Mon. 2/m : P21/m
9.BH.20FencooperiteBa6Fe3+3Si8O23(CO3)2Cl3 · H2OTrig. 3m : P3m1

Related Minerals - Dana Grouping (8th Ed.)Hide,Mg)Be4Si6(O,OH)24Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.6.1BerylBe3Al2(Si6O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
16.6.2EuclaseBeAl(SiO4)(OH)Mon. 2/m : P21/b
16.6.3BaveniteCa4Be2Al2Si9O26(OH)2Orth. mm2
16.6.5MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
16.6.6LovdariteK2Na6Be4Si14O36 · 9H2OOrth. mm2

Fluorescence of AminoffiteHide

Strong organge color.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for AminoffiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hurlbut, C.S. (1937) Aminoffite, a new mineral from Långban. Geologiska Föreningens i Stockholm Förhandlingar: 59: 290-292.
Foshag, W.F. (1938) New mineral names. American Mineralogist: 23: 293-294.
Coda, A., Rossi, G., Ungaretti, L. (1967) The crystal structure of aminoffite. Atti Rend. Accad. Lincei: 43(3-4): 225-232.
Welin, E. (1968) Notes on the mineralogy of Sweden 6. X-ray powder data for minerals from Långban and the related mineral deposits of Central Sweden. Arkiv för Mineralogi och Geologi: 4(30): 499-541.
Huminicki, D.M.C., Hawthorne, F.C. (2002) Refinement of the crystal structure of aminoffite. The Canadian Mineralogist: 40: 915-922.

Internet Links for AminoffiteHide

Localities for AminoffiteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • New South Wales
    • Gough Co.
      • Emmaville (Vegetable Creek)
Handbook of Mineralogy
  • Eastern-Siberian Region
    • Tuva Republic
Handbook of Mineralogy
Kapustin (1973) Doklady of the Academy of Sciences Chukanov, N.V. (2014) Infrared Spectra of Mineral Species: Extended Library. Springer-Verlag GmbH, Dordrecht
Sweden (TL)
  • Värmland
    • Filipstad
Hurlbut, C. S. (1937): Aminoffite, a new mineral from Långban, Geologiska Föreningens i Stockholm Förhandlingar. 59, 290-292 ; Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
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