Albite is a plagioclase feldspar mineral. It is the sodium endmember of the plagioclase solid solution series. It represents a plagioclase with less than...

Friedrich Christian Hessel (1796–1872) in 1826. The series ranges from albite to anorthite endmembers (with respective compositions NaAlSi3O8 to CaAl2Si2O8)...

orthoclase endmember KAlSi3O8 albite endmember NaAlSi3O8 anorthite endmember CaAl2Si2O8 Solid solutions between orthoclase and albite are called alkali feldspar...

chlorite + albite + quartz pumpellyite + chlorite + epidote + albite + quartz pumpellyite + epidote + stilpnomelane + muscovite + albite + quartz In...

feldspar (near albite, NaAlSi3O8, in composition). Typically, the host grain is orthoclase or microcline, and the lamellae are albite. If sodic feldspar...

lattice i.e. niobium, zirconium Albitite, from replacement of plagioclase by albite (albitization) Effects of metasomatism in mantle peridotite can be either...

of orthoclase and albite within the stone. The diffracted light varies from white to blue, depending on the thinness of the albite layers. More technically...

Akrochordite Aksaite Aktashite Alabandite Alacránite Alamosite Alarsite Albite Albrechtschraufite Alcantarillaite Aldermanite Aleksite Aleutite Alforsite...

moonstone, also murchisonite, Ceylon opal, hecatolite — a decorative variety of albite (oligoclase) of white or light gray color with a distinct iridescence effect...

Sanidine and high albite constitute a solid solution series with intermediate compositions termed anorthoclase. Exsolution of an albite phase does occur;...

physical characters it is intermediate between albite (NaAlSi3O8) and anorthite (CaAl2Si2O8). The albite:anorthite molar ratio of oligoclase ranges from...

host composition. In mafic rocks the assemblage is chlorite, prehnite, albite, pumpellyite and epidote. In ultramafic rocks the assemblage is serpentine...

of the minerals glaucophane + ( lawsonite or epidote ) +/- jadeite +/- albite or chlorite +/- garnet +/- muscovite in a rock of roughly basaltic composition...

Perthite is either microcline or orthoclase with thin lamellae of exsolved albite. Amazon stone, or amazonite, is a green variety of microcline. It is not...

Albite Anorthite Anorthoclase Amazonite Bytownite Celsian Microcline Moonstone Adularia (var.) Rainbow (var.) Orthoclase Unakite Plagioclase Albite Labradorite...

Maw sit sit, also known as jade-albite, is a gemstone found exclusively in northern Burma. It was first identified in 1963 by the late Swiss gemologist...

tabular, rhombic in cross section, striated; massive Twinning Common by albite, pericline, Carlsbad, Baveno, or Manebach twin laws Cleavage Perfect on...

hornblende/actinolite +/- albite +/- biotite +/- quartz +/- garnet (calcite +/- wollastonite) Pelite; quartz, orthoclase +/- albite, +/- biotite +/- actinolite...

major minerals are granite, cement limestone, ceramic clay, potassium, albite, salt mine, mirabilite, nepheline, syenite, fluorite, marble, mineral water...

solid solution with albite, the sodium endmember (NaAlSi3O8) of plagioclase. While slowly cooling within the earth, sodium-rich albite lamellae form by exsolution...

quartz, muscovite, orthoclase, and the sodium-rich plagioclase feldspars (albite-rich). In modern usage, the term acid rock, although sometimes used as a...

actinolite + albite +/- epidote Ultramafic: chlorite + serpentine +/- talc +/- tremolite +/- diopside +/- brucite Pelites: quartz +/- albite +/- k-feldspar...

potassium-rich orthoclase and sodium-rich albite; in the case of plagioclase, the most common series ranges from albite to calcium-rich anorthite. Crystal twinning...

of the protolith. For a mafic protolith, the albite-epidote hornfels facies is characterized by albite and epidote or zoisite with minor actinolite and...

refers to a doubly plunging anticline or syncline. Pericline is a form of albite exhibiting elongate prismatic crystals. Pericline twinning is a type of...

under blueschist facies conditions along with other sodic minerals such as albite, jadeite and glaucophane. During the transition from blueschist to greenschist...

intermediate member of the high albite – sanidine alkali feldspar solid solution series. Intermediate members of this series, high albite, anorthoclase and high...

the feldspar minerals plagioclase and microcline. These minerals show the Albite and Pericline Laws. The most common twin operations by crystal system are...

syenite. Litchfieldite is composed of two varieties of feldspar (mostly albite but also some microcline), with nepheline, sodalite, cancrinite and calcite...

containing clay minerals. Chlorite is found in pelites along with quartz, albite, sericite, and garnet, and is also found in associate with actinolite and...