Sanidine

Image

Sanidine specimen from Itrongay, Mahasoa East Commune, Betroka District, Anosy Region, Tuléar Province, Madagascar. Size: 2.5 x 1.9 x 1.0 cm, 47.09 ct.

© Rob Lavinsky, iRocks.com – CC-BY-SA-3.0

Properties

Formula (K,Na)(Si,Al)4O8
Abbreviation Sa
Classification Alkali feldspar
Luminescence emitters Mn, Pb
IMA Status Grandfathered (pre-IMA), 1808
Search other databases webmineral.com, mindat.org, rruf.info, fluomin.org, mineralienatlas.de, Handbook of Mineralogy, American Mineralogist Crystal Structure Database
Tags Mineral, Aluminosilicate

Composition

Element Atoms
Na 0.25
K 0.75
Al 1
Si 3
O 8
Total: 13

Reference

Reference Lines Spectra Images
Tarashchan 1978 2 0 0