Behoite Mineral Data

Behoite Mineral Data +

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General Behoite Information

Chemical Formula:

Be(OH)2

Composition:

Molecular Weight = 43.03 gm

Beryllium 20.95 % Be 58.13 % BeO

Hydrogen 4.69 % H 41.87 % H₂O

Oxygen 74.37 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Be(OH)₂

Environment:

In granite pegmatite as a near-surface alteration product of gadolinite (Rode Ranch pegmatite, Texas, USA); in altered volcanic tuff (Honeycomb Hills, Utah, USA).

IMA Status:

Approved IMA 1970

Locality:

In the USA, from the Rode Ranch pegmatite, Llano Co., and the Clear Creek pegmatite, Brunett Co., Texas, and in the Honeycomb Hills, Juab Co., Utah. Link to MinDat.org Location Data.

Name Origin:

For Beryllium, Be, and hydroxyl, OH, in its composition.

Synonym:

ICSD 25569

PDF 39-1411

Behoite Image

Images:

Behoite Analcime

Comments: Gray-white microcline crystals up to 4 cm coated with overgrowth of analcime 18 mm diameter, black aegirine up to 25 mm and most notable, a pale pink behoite.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Qu?bec, Canada. Scale: 5x4x3 cm.
© John Betts - Fine Minerals

Behoite Crystallography

Axial Ratios:

a:b:c =0.6581:1:0.6453

Cell Dimensions:

a = 4.64, b = 7.05, c = 4.55, Z = 4; V = 148.84 Den(Calc)= 1.92

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

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

By Intensity(I/I_o): 2.38(1), 3.93(0.9), 3.8(0.8),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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H - Help Screen
I - Data Info
A - Atoms On/Off
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Seitz A , Rosler U , Schubert K , Zeitschrift fur Anorganische und Allgemeine Chemie , 261 (1950) p.94-105, Kristallstruktur von beta-Be(OH)2

Physical Properties of Behoite

Cleavage:

None

Color:

Colorless, White, Pale brown.

Density:

1.91 - 1.93, Average = 1.92

Diaphaniety:

Transparent

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Behoite

Gladstone-Dale:

CI meas= -0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2821,KPDmeas= 0.2821,KC= 0.2819

Optical Data:

Biaxial (-), a=1.533, b=1.544, g=1.548, bire=0.0150, 2V(Calc)=60, 2V(Meas)=82.

Calculated Properties of Behoite

Electron Density:

r_electron=1.96 gm/cc
note: r_Behoite=1.92 gm/cc.

Fermion Index

Fermion Index = 0.20981
Boson Index = 0.79019

Photoelectric:

PE_Behoite= 0.33 barns/electron
U=PE_Behoite x r_electron= 0.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Behoite is Not Radioactive

Behoite Classification

Dana Class:

6.2.2.1 (6)Hydroxides and Oxides Containing Hydroxyl

(6.2)where X++ (OH)2

(6.2.2)Dana Group

6.2.2.1 Behoite Be(OH)2 P 2₁2₁2₁ 2 2 2

Strunz Class:

IV/F.01-20 IV - Oxides

IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure

IV/F.01 - Sassolite - Clinobehoite series

IV/F.01-10 Sassolite H3BO3 P1 1

IV/F.01-20 Behoite Be(OH)2 P 2₁2₁2₁ 2 2 2

IV/F.01-30 Clinobehoite Be(OH)2 P 2₁ 2

Other Behoite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Behoite

Be(OH)2
Dana No: 6.2.2.1 Strunz No: IV/F.01-20
Locality:

Notes: