Beryllonite Mineral Data
General Beryllonite Information
Chemical Formula:
NaBePO4
Composition:
Molecular Weight = 126.97 gm
Sodium 18.11 % Na 24.41 % Na2 O
Beryllium 7.10 % Be 19.70 % BeO
Phosphorus 24.39 % P 55.90 % P2 O5
Oxygen 50.40 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
NaBe(PO4 )
Environment:
Occurs as a rare secondary mineral in granitic and alkalic pegmatites.
IMA Status:
Valid Species (Pre-IMA) 1888
Locality:
In the USA, in Maine, found on Sugarloaf Mountain, near Stoneham, at the Dunton quarry and the Bell Pit, Newry, Oxford Co., and other minor occurrences. Link to MinDat.org Location Data.
Name Origin:
For one of the major constituents in the composition, BERYLLium.
Name Pronunciation:
Beryllonite + Pronunciation
Synonym:
ICSD 9271
PDF 33-1213
Beryllonite Image
Images:
Beryllonite
Comments: Clear twinned crystal of beryllonite.
Location: Telecio mine, Linopolis, Minas Gerais, Brazil.
Scale: Crystal size 1 cm.
© John Veevaert
Beryllonite Crystallography
Axial Ratios:
a:b:c =1.0476:1:1.826
Cell Dimensions:
a = 8.13, b = 7.76, c = 14.17, Z = 12; beta = 90° V = 893.97 Den(Calc)= 2.83
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /n
X Ray Diffraction:
By Intensity(I/Io ): 2.84(1), 3.65(0.9), 2.28(0.7),
Physical Properties of Beryllonite
Cleavage:
{???} Perfect, {???} Good, Perfect
Color:
Colorless, White, Light yellow.
Density:
2.8
Diaphaneity:
Transparent to Translucent
Fracture:
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Pearly
Magnetism:
Nonmagnetic
Streak:
white
Optical Properties of Beryllonite
Gladstone-Dale:
CI meas = -0.015 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = -0.004 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1968,KPDmeas = 0.1989,KC = 0.1959 Ncalc = 1.55
Optical Data:
Biaxial (-), a=1.552, b=1.5579, g=1.561, bire=0.0090
Calculated Properties of Beryllonite
Electron Density:
Bulk Density (Electron Density)=2.76 gm/cc note: Specific Gravity of Beryllonite =2.83 gm/cc.
Fermion Index:
Fermion Index = 0.07 Boson Index = 0.93
Photoelectric:
PEBeryllonite = 1.52 barns/electronU=PEBeryllonite x r Electron Density= 4.19 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Beryllonite is Not Radioactive
Beryllonite Classification
Dana Class:
38.01.05.01 (38) Anhydrous Phosphates, etc
(38.01) A+ B++ XO4
(38.01.05) Dana Group
38.01.05.01 Beryllonite NaBePO4 P 21 /n 2/m
Strunz Class:
08.AA.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.A - Phosphates, etc. without additional anions, without H2O
08.AA -With small cations (some also with larger ones)
08.AA.10 Beryllonite NaBePO4 P 21 /n 2/m
Other Beryllonite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Beryllonite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Scandinavian mineral gallery
19 - WWW-MINCRYST
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Print or Cut-and-Paste your Beryllonite Specimen Label here :
Beryllonite
NaBePO4
Dana No: 38.01.05.01 Strunz No: 08.AA.10
Locality:
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