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| Formula: |
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| System: | Orthorhombic | Colour: | White | |||||
| Lustre: | Vitreous | Hardness: | 3 - 3½ | |||||
| Name: | From radium replacing barium and from the Greek, baryos, "heavy." | |||||||
A variety of Barite rich in Radium. [See also under "Hokutolite".] | ||||||||
Classification of Radian Barite | ||||||
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Physical Properties of Radian Barite | ||||||
| Lustre: | Vitreous | |||||
| Colour: | White | |||||
| Streak: | White | |||||
| Hardness (Mohs): | 3 - 3½ | |||||
Crystallography of Radian Barite | ||||||
| Crystal System: | Orthorhombic | |||||
Optical Data of Radian Barite | ||||||
| Type: | Biaxial (+) | |||||
| RI values: | nα = 1.634 - 1.637 nβ = 1.636 - 1.638 nγ = 1.646 - 1.648 | |||||
| 2V: | Measured: 36° to 40°, Calculated: 36° to 42° | |||||
| Maximum Birefringence: | δ = 0.012 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. | |||||
| Surface Relief: | Moderate | |||||
| Dispersion: | weak | |||||
Chemical Properties of Radian Barite | ||||||
| Formula: |
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| Essential elements: | Ba, O, S | |||||
| All elements listed in formula: | Ba, O, Ra, S | |||||
Other Names for Radian Barite | ||||||
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Other Information | ||||||
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. | |||||
Internet Links for Radian Barite | ||||||
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