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Beryllite Mineral Data

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General Beryllite Information

Help on Chemical  Formula: Chemical Formula: Be3SiO4(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 171.15 gm
   Beryllium  15.80 %  Be   43.84 % BeO
   Silicon    16.41 %  Si   35.11 % SiO2
   Hydrogen    2.36 %  H    21.05 % H2O
   Oxygen     65.44 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Be3(SiO4)(OH)2•(H2O)
Help on Environment: Environment: In alkaline pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1954
Help on Locality: Locality: Lovozero massif, Koa Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in allusion to the beryllium content.
Help on Name Pronunciation: Name Pronunciation: Beryllite + Pronunciation Say BERYLLITE
Help on Synonym: Synonym: Metaberyllite - variety of beryllite with lower H2O content

Beryllite Image

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Comments: Dirty white, soft, chalky filling of beryllite (Green Arrow) in a vuggy matrix.
Location: Lovozero, Mt. Karnasurt, Kola Peninsula, Russia. Scale: Size Not Given.
© Tom Loomis / Dakota Matrix

Beryllite Crystallography

Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.34(1), 4.01(1), 3.64(0.9),

Physical Properties of Beryllite

Help on Color: Color: White.
Help on Density: Density: 2.196
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 1 - Talc
Help on Luminescence: Luminescence: Fluorescent, Short UV=gray green.
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Beryllite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2511,KC= 0.2498
Ncalc = 1.55
Help on Optical Data: Optical Data: Biaxial (-), a=1.541, b=1.553, g=1.56, bire=0.0190
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Beryllite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.21 gm/cc
note: Specific Gravity of Beryllite =2.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.16
Boson Index = 0.84
Help on Photoelectric: Photoelectric: PEBeryllite = 0.84 barns/electron
U=PEBeryllite x rElectron Density= 1.85 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Beryllite is Not Radioactive

Beryllite Classification

Help on  Dana Class: Dana Class: (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.01)with cations in [4] coordination
  (52.01.01)Dana Group Beryllite Be3SiO4(OH)2•(H2O) Unk Ortho
Help on  Strunz Class: Strunz Class: 09.AE.05 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AE -Nesosilicates with additional (O,OH,F,H2O);
09.AE.05 Beryllite Be3SiO4(OH)2•(H2O) Unk Ortho

Other Beryllite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana;Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Beryllite :
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.AE.05





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