Triphane
| Refractive Index : 1.676 – 1.660 + 0.005 – 0.005 |
| Optical Characteristic : DR B+ |
| Specific Gravity : 3.18 + 0.03 – 0.03 |
| Formula : LiAISi2O6 |
| Crystal System : Monoclinic |
| Variety/Species : Spodumene |
| Species/Group : Pyroxene group |
| Birefringence : 0.014 to0.016 |
| Dispersion : 0.017 |
| Hardness : 6.5 to 7 |
| Toughness : Poor |
| Ultrasonic : Never |
| Steam : Never |
| UV Long : Inert to moderate |
| UV Short : Inert to moderate |
| Pleochroism : 2 or 3 colors |
| Strength : weak to moderate |
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| Pleochroism Colors : Weak to moderate: Light yellow/ very light yellow. |
| Heat : Sensitive |
| Acids : Avoid hydrofluoric acid |
| Light : some may fade |
| Polish Luster : vitreous |
| Fracture : Uneven to splintery |
| Fracture Luster : Vitreous |
| Clarity Type : I |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : Iron |
| Enhancements : Irradiation |
| Cleavage : perfect in 1 direction. |
| Color Range : Yellow Yellowish |
| Transparency : Transparent |
| Phenomena : None |
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| Separations : Triphane from- Phenakite : Optic character, SG, Cleavage, fluorescene(possibly) Euclase : Birefringence, SG, cleavage, fluorescence, color(possibly) Beryl : RI, SG, optic character, cleavage |
| Identifying Characteristics and information May have loquid inclusions. May show only 2 colors of pleochrosim. |
| Spectral Data Lines at 4330 and 4380. |
| Trade Names and Misnomers Triphane |
Tags: Pyroxene Group, Spodumene, triphane
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