Stibiotantalite
| Refractive Index : 2.460 – 2.370 |
| Optical Characteristic : DR, B+ |
| Specific Gravity : 7.46 – 7.34 |
| Formula : SbTaO4 |
| Crystal System : Orthorhombic |
| Variety/Species : All |
| Species/Group : stibiotantalite |
| Birefringence : 0.090 |
| Dispersion : 0.146 |
| Hardness : 5 to 5.5 |
| Toughness : poor |
| Ultrasonic : Never |
| Steam : Never |
| UV Long : Inert |
| UV Short : Inert |
| Pleochroism : None |
| Strength : N/A |
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| Pleochroism Colors : None |
| Heat : sensitive |
| Acids : sensitive |
| Light : stable |
| Polish Luster : vitreous to resinous |
| Fracture : subsconchoidal |
| Fracture Luster : |
| Clarity Type : N/A |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : |
| Enhancements : none |
| Cleavage : distinct 1 direction. |
| Color Range : Brown, greenish yellow, yellow, yellow brown, reddish yellow, yellowish brown, yellowish gray |
| Transparency : Transparent to translucent |
| Phenomena : None |
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| Separations : Stibiotantalite from- |
| Identifying Characteristics and information Light yellow streak. Often color zoned. Tranparent specimens extremely rare. Stibiotantalite is an oxide of antimony, tantalum and columbian. |
| Spectral Data not diagnostic. |
| Trade Names and Misnomers Stibiotantalite |
Tags: Orthorhombic, stibiotantalite
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