Difference between revisions of "Sanidine"
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== Description == | == Description == | ||
| − | A high temperature form of potassium [ | + | A high temperature form of potassium [[feldspar| feldspar]] that typically is found in volcanic rocks such as [[obsidian|obsidian]] and [[rhyolite|rhyolite]]. The colorless to white stone has tabular, or sometimes [[acicular|acicular]], crystals. |
== Other Properties == | == Other Properties == | ||
Revision as of 12:03, 10 May 2016
Description
A high temperature form of potassium Feldspar that typically is found in volcanic rocks such as Obsidian and Rhyolite. The colorless to white stone has tabular, or sometimes Acicular, crystals.
Other Properties
Monoclinic crystal system; cleavage = perfect in one direction; fracture = uneven; luster = vitreous; streak = white;
| Composition | (K,Na)(Si,Al)4O8 |
|---|---|
| Mohs Hardness | 6 |
| Density | 2.52 |
| Refractive Index | 1.518 - 1.530 |