Mineralogy Database

Aminoffite Mineral Data

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General Aminoffite Information

Help on Chemical  Formula: Chemical Formula: Ca3Be2Si3O10(OH)2
Help on Composition: Composition: Molecular Weight = 416.52 gm
   Calcium    28.87 %  Ca   40.39 % CaO
   Beryllium   4.33 %  Be   12.01 % BeO
   Silicon    20.23 %  Si   43.28 % SiO2
   Hydrogen    0.48 %  H     4.33 % H2O
   Oxygen     46.09 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Be2(Si3O10)(OH)2
Help on Environment: Environment: In fluorite veins in the Dugdinsk Massif, Tuva, Siberia, Russia.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1937
Help on Locality: Locality: Langban, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gregori Aminoff (1993-1947), Swedish Mineralogist and crystallographer.
Help on Name Pronunciation: Name Pronunciation: Aminoffite + Pronunciation Say AMINOFFITE
Help on Synonym: Synonym: ICSD 32654
  PDF 23-80

Aminoffite Image

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Comments: Clear, pyramidal aminoffite crystal.
Location: Langban, Varmland, Sweden. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Aminoffite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.00658
Help on Cell Dimensions: Cell Dimensions: a = 9.865, c = 9.93, Z = 4; V = 966.37 Den(Calc)= 2.86
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.614(1), 2.84(0.9), 4.02(0.8),

Physical Properties of Aminoffite

Help on Cleavage: Cleavage: {001} Indistinct
Help on Color: Color: Colorless, Light yellow.
Help on Density: Density: 2.94
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Aminoffite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2245,KPDmeas= 0.2184,KC= 0.2184
Ncalc = 1.62 - 1.64
Help on Optical Data: Optical Data: Uniaxial (-), e=1.637, w=1.647, bire=0.0100.

Calculated Properties of Aminoffite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.94 gm/cc
note: Specific Gravity of Aminoffite =2.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEAminoffite = 4.36 barns/electron
U=PEAminoffite x rElectron Density= 12.81 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aminoffite is Not Radioactive

Aminoffite Classification

Help on  Dana Class: Dana Class: (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups
  (57.01)with [Si3O10] groups
  (57.01.01)Aminoffite and related species Aminoffite Ca3Be2Si3O10(OH)2 I 4/mmm 4/m 2/m 2/m Harstigite Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 Pcmn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.BH.05 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BH -Sorosilicates with Si3O10, Si4O11, etc
09.BH.05 Aminoffite Ca3Be2Si3O10(OH)2 I 4/mmm 4/m 2/m 2/m

Other Aminoffite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Aminoffite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.BH.05





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