Hambergite Mineral Data

Hambergite Mineral Data +

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General Hambergite Information

Chemical Formula:

Be2BO3(OH)

Composition:

Molecular Weight = 93.84 gm

Beryllium 19.21 % Be 53.31 % BeO

Boron 11.52 % B 37.09 % B₂O₃

Hydrogen 1.07 % H 9.60 % H₂O

Oxygen 68.20 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Be₂(BO₃)(OH)

IMA Status:

Valid Species (Pre-IMA) 1890

Locality:

HEL Link to MinDat.org Location Data.

Synonym:

ICSD 81591

PDF 17-475

Hambergite Image

Images:

Hambergite

Comments: Clear colorless prismatic crystal of hambergite.
Location: Imalo, near Mania, Madagascar. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hambergite Crystallography

Axial Ratios:

a:b:c =0.798:1:0.3622

Cell Dimensions:

a = 9.76, b = 12.23, c = 4.43, Z = 8; V = 528.79 Den(Calc)= 2.36

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P bca

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

By Intensity(I/I_o): 3.82(1), 3.13(0.9), 4.53(0.8),

Forms:

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Crystal Structure:

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Burns P C , Novak M , Hawthorne F C , The Canadian Mineralogist , 33 (1995) p.1205-1213, Fluorine-hydroxyl variation in hambergite: A crystal-structure study, Note: sample HM1, Locality: Himalaya mine, California, USA

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

Physical Properties of Hambergite

Cleavage:

[010] Perfect, [100] Good

Color:

Colorless, Gray white, Yellowish white, White.

Density:

2.372

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

7.5 - Garnet

Luminescence:

Fluorescent.

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Hambergite

Gladstone-Dale:

CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.25,KPDmeas= 0.2487,KC= 0.2403

Optical Data:

Biaxial (+), a=1.55, b=1.59, g=1.63, bire=0.0800

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Hambergite

Electron Density:

r_electron=2.33 gm/cc
note: r_Hambergite=2.37 gm/cc.

Fermion Index

Fermion Index = 0.21532
Boson Index = 0.78468

Photoelectric:

PE_Hambergite= 0.33 barns/electron
U=PE_Hambergite x r_electron= 0.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hambergite is Not Radioactive

Hambergite Classification

Dana Class:

25.1.1.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.1)Dana Type

(25.1.1)Dana Group

25.1.1.1 Hambergite Be2BO3(OH) P bca 2/m 2/m 2/m

Strunz Class:

V/L.02-10 V - Nitrates, Carbonates and Borates

V/L - Shelly borates with [BO2]1- to [B6O10]2-

V/L.02 - Hambergite - Rhodizite series

V/L.02-10 Hambergite Be2BO3(OH) P bca 2/m 2/m 2/m

V/L.02-20 Rhodizite (K,Cs)Al4Be4(B,Be)12O28 P 43m 4 3m

V/L.02-30 Londonite! CsAl4Be4(B,Be)12O28 P 43m 4 3m

Other Hambergite Information

References:

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 Hambergite Specimen Label here :

Hambergite

Be2BO3(OH)
Dana No: 25.1.1.1 Strunz No: V/L.02-10
Locality:

Notes: