Thortveitite Explained
| Thortveitite |
| Formula: | (Sc,Y)2Si2O7 |
| Imasymbol: | Tvt[1] |
| Strunz: | 9.BC.05 |
| System: | Monoclinic |
| Class: | Prismatic (2/m)
(same H-M symbol) |
| Symmetry: | C2/m |
| Mohs: | 5–6 |
| Luster: | vitreous |
| Streak: | gray |
| Gravity: | 3.3–3.8 |
Thortveitite is a rare mineral consisting of scandium yttrium silicate (Sc,Y)2Si2O7. It is the primary source of scandium. Occurrence is in granitic pegmatites. It was named after Olaus Thortveit, a Norwegian engineer. It is grayish-green, black or gray in color.[2] [3] [4] [5]
A transparent gem quality example was found in 2004, and reported in The Journal of Gemmology.[6]
See also
Notes and References
- Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3. 291–320. 10.1180/mgm.2021.43. 2021MinM...85..291W. 235729616. free.
- Web site: Thortveitite Mineral Data. 2021-05-03. webmineral.com.
- Web site: Thortveitite. 2021-05-03. www.mindat.org.
- Bianchi. Riccardo. Pilati. Tullio. Diella. Valeria. Gramaccioli. Carlo Maria. Mannucci. Gregorio. 1988-06-01. A re-examination of thortveitite. American Mineralogist. en. 73. 5–6. 601–607. 0003-004X.
- Book: Mineralien aus aller Welt. 1990. Walter Schumann. 978-3-405-14003-8. München. 610708490.
- Chapman, R., Mercer, I.F., Rankin, A.H., Spratt, J.. 2008. Thortveitite – a new gemstone. Journal of Gemmology. 31. 1–6. 10.15506/JoG.2008.31.1.1.
