Sanidine is the high temperature form of potassium feldspar with a general formula K(AlSi 3 O 8). [2] Sanidine is found most typically in felsic volcanic rocks such as obsidian , rhyolite and …

透长石（sanidine）长石族矿物，正长石的一个亚种，以钾长石分子为主要组成，但也含较多的钠长石分子（可达50%），偶尔也含bao（5%以下），是正长石的高温变种。

With current classifications, the name anorthoclase is discontinued and the intermediates should be called either albite (if Na>K) or sanidine (if K>Na). It is common in many potassic volcanic …

2023年4月23日 · Sanidine forms spherular masses of needlelike crystals in obsidian, giving rise to what is called snowflake obsidian. Significant occurrences of sanidine are at the Alban Hills …

Polymorphism &Series: High sanidine forms a series with high albite. Mineral Group: Feldspar (alkali) group; (Al,Si) completely disordered. Occurrence: Most common in felsic volcanic and …

Detailed description, properties, locality information guide about the potassium feldspar mineral sanidine.

Sanidine ((K,Na)AlSi 3 O 8) is the monoclinic high-temperature alkaline K–Na feldspar, which usually contains about 30%, but sometimes up to 62% sodium (Ab) component. It is found …

Solid solution of sodium (albite) possible, but not common. The difference between sanidine, orthoclase, and microcline is its random order of placement of Al within bonding sites. …

Sanidine. Comments: Blocky, opalescent crystal of sanidine. Location: Mina La Pili, Carmago, Chihuahua, Mexico. Scale: Crystal size 3x2 cm. © Dave Barthelmy

sanidine /ˈsænɪˌdiːn, -dɪn/ 1.N an alkali feldspar that is a high-temperature glassy form of orthoclase in flat, tabular crystals, found in lavas and dykes. Formula: KAlSi3O8 透长石 [1]