Euclase Mineral Data

Euclase Mineral Data
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General Euclase Information

Help on Chemical Formula: Chemical Formula: BeAlSiO4(OH)
Help on Composition: Composition: Molecular Weight = 145.08 gm
   Beryllium   6.21 %  Be   17.24 % BeO
   Aluminum   18.60 %  Al   35.14 % Al2O3
   Silicon    19.36 %  Si   41.41 % SiO2
   Hydrogen    0.69 %  H     6.21 % H2O
   Oxygen     55.14 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BeAl(SiO4)(OH)
Help on Environment: Environment: Hydrothermal, pegmatitic, and alluvial rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1792
Help on Locality: Locality: Orenburg district in the southern Urals, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek eu - "well" and klasis - "breaking."
Help on Name Pronunciation: Name Pronunciation: Euclase Say EUCLASE
Help on Synonym: Synonym: ICSD 202094
  PDF 14-65
 

Euclase Image

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Euclase

Comments: Euclase with sharp edges and great color. This specimen is from one of the famous and finest world finds of euclase, in the Colombian Emeralds area.
Location: Chivor, Columbia. Scale: 1.2 x 0.6 cm.
© Fabre Minerals

Euclase Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.3333:1:0.3231
Help on Cell Dimensions: Cell Dimensions: a = 4.763, b = 14.29, c = 4.618, Z = 4; beta = 100.3° V = 309.25 Den(Calc)= 3.12
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.15(1), 3.219(0.5), 3.836(0.35),
Click Here for Large Euclase Structure Window Crystal Structure:

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Hazen R M , Au A Y , Finger L W , American Mineralogist , 71 (1986) p.977-984, High-pressure crystal chemistry of beryl (Be3Al2Si6O18) and euclase (BeAlSiO4OH), Sample: Pressure = .001 kbar

View Additional jPOWD Structure files for Euclase
[1] [2] [3] [4]
 

Physical Properties of Euclase

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Blue, Colorless, White, Light blue, Light green.
Help on Density: Density: 2.987 - 3.1, Average = 3.04
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Euclase

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.045 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2113,KPDmeas= 0.2166,KC= 0.2214
Ncalc = 1.66 - 1.69
Help on Optical Data: Optical Data: Biaxial (+), a=1.652, b=1.655, g=1.671, bire=0.0190, 2V(Calc)=48, 2V(Meas)=50. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
 

Calculated Properties of Euclase

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.02 gm/cc
note: Specific Gravity of Euclase =3.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEEuclase = 1.36 barns/electron
U=PEEuclase x rElectron Density= 4.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Euclase is Not Radioactive
 

Euclase Classification
Help on Dana Class: Dana Class: 52.02.01.01 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.02)with cations in [4] and >[4] coordination
  (52.02.01)Euclase group
 
52.02.01.01 Euclase BeAlSiO4(OH) P 21/a 2/m
 
52.02.01.02 Clinohedrite CaZnSiO4•(H2O) Aa m
 
52.02.01.03 Hodgkinsonite MnZn2SiO4(OH)2 P 21/c 2/m
 
52.02.01.04 Gerstmannite (Mg,Mn)2ZnSiO4(OH)2 Bbam 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 09.AE.10 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AE -Nesosilicates with additional (O,OH,F,H2O);
 
09.AE.10 Euclase BeAlSiO4(OH) P 21/a 2/m
 

Other Euclase Information
Help on See Also: See Also: Links to other databases for Euclase :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - CalTech Mineral Spectroscopy
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - Philatelic Mineralogy
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Scandinavian mineral gallery
19 - Tradeshop.com - The Rainbow of Gems
20 - WWW-MINCRYST

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Euclase

BeAlSiO4(OH)
Dana No: 52.02.01.01 Strunz No: 09.AE.10
Locality:

 

Notes: