Bromellite Mineral Data

Bromellite Mineral Data +

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General Bromellite Information

Chemical Formula:

BeO

Composition:

Molecular Weight = 25.01 gm

Beryllium 36.03 % Be 100.00 % BeO

Oxygen 63.97 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BeO

Environment:

Occurs with swedenborgite.

IMA Status:

Valid Species (Pre-IMA) 1825

Locality:

Langbanshyttan, Vermland, Sweden. Link to MinDat.org Location Data.

Name Origin:

For Magnus von Bromell (1670-1731), Swedish physician and mineralogist.

Synonym:

ICSD 62726

PDF 35-818

Bromellite Image

Images:

Bromellite

Comments: Nearly colorless translucent crystalline bromellite in chloritic schistose rock.
Location: Pitkyaranta, Republic of Karelia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Bromellite Magnesioferrite

Comments: A micro, water color, hexagonal or barrel shaped crystal of white bromellite to about 0.3 mm on yellowish calcite with associated black magnesioferrite.
Location: Langban, Varmland, Sweden. Scale: 18x9x10mm.
© Tom Loomis / Dakota Matrix

Bromellite Crystallography

Axial Ratios:

a:c = 1:1.62686

Cell Dimensions:

a = 2.68, c = 4.36, Z = 2; V = 27.12 Den(Calc)= 3.06

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

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

By Intensity(I/I_o): 2.061(1), 2.337(0.91), 2.189(0.61),

Forms:

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Forms: [ 1 1 2] [ 1 0 1] [ 0 1 0] [ 0 0 1]

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Crystal Structure:

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Wyckoff R W G , Crystal Structures , 1 (1963) p.85-237, Second edition. Interscience Publishers, New York, New York, Note: wurtzite structure

Physical Properties of Bromellite

Cleavage:

[1010] Distinct

Color:

White.

Density:

3.017

Diaphaniety:

Transparent to translucent

Hardness:

9 - Corundum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Bromellite

Gladstone-Dale:

CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2373,KPDmeas= 0.2406,KC= 0.24

Optical Data:

Uniaxial (+), w=1.719, e=1.733, bire=0.0140.

Calculated Properties of Bromellite

Electron Density:

r_electron=2.89 gm/cc
note: r_Bromellite=3.02 gm/cc.

Fermion Index

Fermion Index = 0.36062
Boson Index = 0.63938

Photoelectric:

PE_Bromellite= 0.31 barns/electron
U=PE_Bromellite x r_electron= 0.90 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bromellite is Not Radioactive

Bromellite Classification

Dana Class:

4.2.2.2 (4)Simple Oxides

(4.2)with a cation charge of 2+ (A++ O)

(4.2.2)Dana Group

4.2.2.1 Zincite (Zn,Mn)O P 6₃mc 6mm

4.2.2.2 Bromellite BeO P 6₃mc 6mm

Strunz Class:

IV/A.03-10 IV - Oxides

IV/A - Oxides with metal : oxygen = 1:1 and 2:1 (M2O,MO)

IV/A.03 - Brommelite - Zincite series

IV/A.03-10 Bromellite BeO P 6₃mc 6mm

IV/A.03-20 Zincite (Zn,Mn)O P 6₃mc 6mm

Other Bromellite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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Ask about Bromellite here :
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Print or Cut-and-Paste your Bromellite Specimen Label here :

Bromellite

BeO
Dana No: 4.2.2.2 Strunz No: IV/A.03-10
Locality:

Notes: