General Information
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| Chemical
Formula: |
Be2BO3(OH) |
| Composition: |
Molecular Weight = 93.84 gm |
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Berylium
19.21 % Be 53.31 % BeO |
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Boron 11.52 % B 37.09 % B2O3 |
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Hydrogen 1.07 % H 9.60 % H2O |
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Oxygen 68.20 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OxIDE |
| Empirical
Formula: |
Be2(BO3)(OH) |
| Locality: |
HEL, MADAGASCAR |
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Hambergite Images
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Click on the picture to go to
Hambergite crystal.
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©
Image by A. Darbellay |
Crystallography
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| 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: |
Orthorombic-Dipyramidal
H-M Symbol (2/m 2/m 2/m) Space Group: Pbca |
| x
Ray Diffraction: |
By Intensity(I/Io):
3.82(1)3.13(0.9)4.53(0.8) |
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Physical Properties
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| Cleavage: |
[010] Perfect, [100] Good |
| Color: |
colorless, gray white, yellowish
white, or white. |
| Density: |
2.372 |
| Diaphaniety: |
Transparent to Translucent |
| Fracture: |
Brittle - Generally displayed by
glasses and most non-metallic minerals. |
| Hardness: |
7.5 - Garnet |
| Luminescence: |
----- |
| Luster: |
Vitreous - Dull |
| Streak: |
white |
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Optical Properties
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| Optical
Data: |
Biaxial (+), a=1.55, b=1.59,
g=1.63, bire=0.0800 |
| Pleochroism
(x): |
colorless. |
| Pleochroism
(y): |
colorless. |
| Pleochroism
(z): |
colorless. |
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Classification
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| Dana
Class: |
Anhydrous Borates Containing
Hydroxyl or Halogen |
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Dana Type |
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Dana Group |
| Strunz
Class: |
Nitrates, Carbonates and
Borates |
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Shelly borates with [BO2]1-
to [B6O10]2- |
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STRUNZ V/L.02-10 - Nitrates,
Carbonates and Borates [Shelly borates with [BO2]1- to [B6O10]2-
{Hambergite - Rhodizite series}] |
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- Hambergite
Be2BO3(OH) Pbca 2/m 2/m 2/m
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- Rhodizite
(K,Cs)Al4Be4(B,Be)12O28 P43m- -4 3m
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