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. |
| − | == | + | == Physical and Chemical Properties == |
| − | Monoclinic crystal system; | + | * Monoclinic crystal system; |
| + | * Cleavage = perfect in one direction; | ||
| + | * Fracture = uneven; | ||
| + | * Luster = vitreous; | ||
| + | * Streak = white; | ||
{| class="wikitable" | {| class="wikitable" | ||
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|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 2.52 | + | | 2.52 g/ml |
|- | |- | ||
! scope="row"| Refractive Index | ! scope="row"| Refractive Index | ||
Latest revision as of 14:22, 13 June 2022
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.
Physical and Chemical 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 g/ml |
| Refractive Index | 1.518 - 1.530 |