Exsolution is a process by which a solid solution phase unmixes into two separate phases in the solid state. Exsolution occurs only in minerals whose compositions vary between two or more …

Perthite or perthitic texture is used to describe an intergrowth of two feldspars: a host grain of potassium-rich alkali feldspar (near K-feldspar, KAlSi 3 O 8, in composition) includes exsolved …

2022年12月16日 · An original pyroxene (subcalcic augite) unmixed upon cooling, producing exsolution lamellae (the stripes) and the texture we see here. The blue-red lamellae are …

Exsolution lamellae are fine crystals that were dissolved entirely in their host mineral structures at high temperature (e.g., clino- and orthopyroxenes) and/or pressure (e.g., majorite-pyroxenes), …

Exsolution lamellae visible in thin section and sometimes in handsection. Mircoperthite is only seen microscopically, cryptoperthite is submicroscopic and needs x-ray diffraction to see …

However, the presence of visible exsolution lamellae is almost always indicative of microcline. Thin section: Plane Light: Low negative relief. Colorless but may appear dusty or cloudy. …

The crystallographic orientations of exsolution lamellae in pyroxene hosts are critical for estimating exsolution temperatures and pressures by the exact phase boundary method. The …

2010年5月13日 · This activity is designed as a stand-alone exercise to be used in a laboratory section of the associated course to introduce the concept of exsolution, model intracrystalline …

exsolution lamellae and the large flat sides of adjacent like lamellae is proposed as the principal mechanism for the coarsening of lamellar exsolution textures in silicate minerals. Following the …

The formation of two generations of exsolution lamellae, as well as of likely metastable pigeonite, suggest non-equilibrium conditions. Cooling was sufficiently slow to allow the formation of the …