Aminoffite Mineral Data

General Aminoffite Information

Chemical Formula:

Ca3Be2Si3O10(OH)2

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

Empirical Formula:

Ca₃Be₂(Si₃O₁₀)(OH)₂

Environment:

In fluorite veins in the Dugdinsk Massif, Tuva, Siberia, Russia.

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

Langban, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Gregori Aminoff (1993-1947), Swedish Mineralogist and crystallographer.

Name Pronunciation:

Aminoffite + Pronunciation

Synonym:

ICSD 32654

PDF 23-80

Aminoffite Image

Images:

Aminoffite

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

Aminoffite Crystallography

Axial Ratios:

a:c = 1:1.00658

Cell Dimensions:

a = 9.865, c = 9.93, Z = 4; V = 966.37 Den(Calc)= 2.86

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/I_o): 2.614(1), 2.84(0.9), 4.02(0.8),

Physical Properties of Aminoffite

Cleavage:

{001} Indistinct

Color:

Colorless, Light yellow.

Density:

2.94

Diaphaneity:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

5.5 - Knife Blade

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Aminoffite

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

Optical Data:

Uniaxial (-), e=1.637, w=1.647, bire=0.0100.

Calculated Properties of Aminoffite

Electron Density:

Bulk Density (Electron Density)=2.94 gm/cc
note: Specific Gravity of Aminoffite =2.94 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Aminoffite= 4.36 barns/electron
U=PE_Aminoffite x rElectron Density= 12.81 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aminoffite is Not Radioactive

Aminoffite Classification

Dana Class:

57.01.01.01 (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups

(57.01)with [Si3O10] groups

(57.01.01)Aminoffite and related species

57.01.01.01 Aminoffite Ca3Be2Si3O10(OH)2 I 4/mmm 4/m 2/m 2/m

57.01.01.02 Harstigite Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 Pcmn 2/m 2/m 2/m

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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
15 - WWW-MINCRYST

Search for Aminoffite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Aminoffite :

Ask about Aminoffite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Aminoffite Specimen Label here :

Aminoffite

Ca3Be2Si3O10(OH)2
Dana No: 57.01.01.01 Strunz No: 09.BH.05
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.