scapolite
Sign in to saveThe scapolites (, "rod", and , "stone") are a group of rock-forming silicate minerals composed of aluminium, calcium, and sodium silicate with chlorine, carbonate and sulfate. The two endmembers are meionite () and marialite (). Silvialite is also a recognized member of the group.
Key facts
- Mineral.name
- Scapolite group
- Mineral.image
- Scapolite, elbaïte, cleavelandite 7100.1.2830.jpg
- Mineral.imagesize
- 260px
- Mineral.category
- Tectosilicate minerals
- Mineral.group
- Scapolite group
- Mineral.IMAsymbol
- Scp
- Mineral.color
- Pink, red, blue, brown, white, grey, colourless, green, yellow, orange, purple
- Mineral.system
- Tetragonal
- Mineral.cleavage
- Good, in 2 directions
- Mineral.fracture
- Conchoidal, uneven, brittle
- Mineral.mohs
- 5.5–6
- Mineral.luster
- Vitreous
- Mineral.streak
- White
- Mineral.diaphaneity
- Opaque to transparent
- Mineral.gravity
- 2.6–2.74
- Mineral.opticalprop
- Uniaxial (–)
- Mineral.refractive
- nω = 1.555–1.594nε = 1.526–1.565
- Mineral.birefringence
- 0.004–0.038
via Wikipedia infobox
Article
7 sectionsContents
- Properties
- Scapolite bearing rocks
- Limestones and contact metamorphic rocks
- Mafic igneous rocks
- Scapolite-hornblende rocks
- Metamorphic rocks of gneissose character
- References
The scapolites (, "rod", and , "stone") are a group of rock-forming silicate minerals composed of aluminium, calcium, and sodium silicate with chlorine, carbonate and sulfate. The two endmembers are meionite () and marialite (). Silvialite is also a recognized member of the group.
==Properties== thumb|left|Fluorescence of an intermediate member of the group thumb|upright|Marialite, a component of scapolite, from [[Tanzania at the National Museum of Natural History]]