Beryllonite Mineral Data

General Beryllonite Information

Chemical Formula:

NaBePO4

Composition:

Molecular Weight = 126.97 gm

Sodium 18.11 % Na 24.41 % Na₂O

Beryllium 7.10 % Be 19.70 % BeO

Phosphorus 24.39 % P 55.90 % P₂O₅

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 - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.84(1), 3.65(0.9), 2.28(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Giuseppetti G , Tadini C , Tschermaks Mineralogische und Petrographische Mitteilungen , 20 (1973) p.1-12, Refinment of the crystal structure of beryllonite

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:

PE_Beryllonite= 1.52 barns/electron
U=PE_Beryllonite x rElectron 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:

Notes: