Strontium Titanate

1. Chemical Composition Strontium Titanate - SrTiO3
2. Classification / Type Strontium Titanate is a man made material. The term synthetic is not used to refer to this material, since it does not have a natural counterpart.
3. Colors / Varieties Colorless when pure; dopants give various colors.
4. Crystal System Cubic System
5. Hardness 6
6. Specific Gravity 5.13
7. Cleavage / Fracture None / Conchoidal fracture
8. Optic Character Isotropic (S.R.)
9. Lustre Sub-Adamantine
10. Refractive Index / Birefringence 2.409
11. Pleochroism None
12. Dispersion 0.190 (high fire)
13. Magnification Generally clean, but gas bubbles maybe seen, dispersive fire is seen on the pavilion facets.
14. U.V. Fluorescence Inert
15. Cause of Color -
16. Spectrum Not characteristic
17. Treatment (Enhancement) -
18. Specific Tests & Remarks High dispersive fire; low see through effect.
19. Synthesis Flame Fusion Method
20. Simulants (with key separation tests) Diamond (dispersion, S.G.), Y.A.G. (dispersion, S.G.), G.G.G. (S.G., dispersion), Zircon (optic character, doubling, spectrum), Synthetic Rutile (optic character, dispersion), Synthetic Cubic Zirconia (dispersion, S.G.), etc.
21. Geological Occurrence In a laboratory. No natural counterpart.
22. Sources -
23. Cuts & Uses Facetted cuts, beads, etc.