| Reference Type | Journal (article/letter/editorial) |
|---|
| Title | Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si
composition near the 14/m–P42/n phase
transition |
|---|
| Journal | Mineralogical Magazine | ISSN | 0026-461X |
|---|
| Authors | Teertstra, D. K. | Author |
|---|
| Schindler, M. | Author |
| Sherriff, B. L. | Author |
| Hawthorne, F. C. | Author |
| Year | 1999 (June) | Volume | 63 |
|---|
| Issue | 3 |
|---|
| Publisher | Mineralogical Society |
|---|
| Download URL | https://rruff.info/doclib/MinMag/Volume_63/63-3-321.pdf+ |
|---|
| DOI | doi:10.1180/002646199548547Search in ResearchGate |
|---|
| Generate Citation Formats |
|---|
| Mindat Ref. ID | 1285 | Long-form Identifier | mindat:1:5:1285:4 |
|---|
|
| GUID | 0 |
|---|
| Full Reference | Teertstra, D. K., Schindler, M., Sherriff, B. L., Hawthorne, F. C. (1999) Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si
composition near the 14/m–P42/n phase
transition. Mineralogical Magazine, 63 (3) 321-329 doi:10.1180/002646199548547 |
|---|
| Plain Text | Teertstra, D. K., Schindler, M., Sherriff, B. L., Hawthorne, F. C. (1999) Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si
composition near the 14/m–P42/n phase
transition. Mineralogical Magazine, 63 (3) 321-329 doi:10.1180/002646199548547 |
|---|
| Abstract/Notes | AbstractSilvialite, ideally Ca4Al6Si6O24SO4, is tetragonal, I4/m, Z = 2, with a = 12.160(3), c = 7.560(1) Å, V = 1117.9(8) Å3, c:a = 0.6217:1, ω = 1.583, ε = 1.558 (uniaxial negative), Dm = 2.75 g/cm3, Dcalc = 2.769 g/cm3 and H (Mohs) = 5.5. It is transparent and slightly yellow, has a good {100} cleavage, chonchoidal fracture, white streak and a vitreous lustre. It occurs in upper-mantle garnet-granulite xenoliths hosted by olivine nephelinite, from McBride Province, North Queensland, Australia. The empirical formula, derived from electron-microprobe analysis, is (Na1.06Ca2.86)(Al4.87Si7.13)O24 [(SO4)0.57(CO3)0.41]. Crystal-structure refinement shows disordered carbonate and sulfate groups along the fourfold axis. Silvialite is a primary cumulate phase precipitated from alkali basalt at 900–1000°C and 8–12 kbar under high fSO2 and fO2. The name silvialite, currently used in literature to describe the sulfate analogue of meionite, was suggested by Brauns (1914). |
|---|
These are possibly similar items as determined by title/reference text matching only.
