Sample preparation : Due to its most common habit, which is granular, the polishing of cancrinite is quite difficult and is of low quality, with many holes, which end up being diagnostic, because the minerals that occur associated with cancrinite exhibit a much better polish.
钙霞石 - 维基百科，自由的百科全书
鈣霞石（英語： Cancrinite ）是含鈉、鈣和鋁的複合碳酸鹽和矽酸鹽，分子式為 Na 6 Ca 2 (CO 3) 2 Al 6 Si 6 O 24 •2H 2 ONa 6 Ca 2 (CO 3)2Al 6 Si 6 O 24 •2H 2 O ，它被歸類為似長石礦物中的一種； [1] 含低量二氧化矽的鹼性長石。 顔色有多種：黃色、橙色、粉紅色、白色甚至藍色。
钙霞石 - 百度百科
钙霞石（cancrinite）是似长石矿物的一种，为含钠和钙的碳酸盐-铝硅酸盐。 它是一种稀少的矿物，霞石和长石蚀变后可生成此矿物，变质岩和石灰岩与岩浆接触后也可生成这种矿物。
Cancrinite - Wikipedia
Cancrinite is a complex carbonate and silicate of sodium, calcium and aluminium with the formula Na 6 Ca 2 [(C O 3) 2 |Al 6 Si 6 O 24]·2H 2 O. It is classed as a member of the feldspathoid group of minerals ; the alkali feldspars that are poor in silica .
Cancrinite Mineral Data
Cancrinite. Comments: Milky white, translucent fan-shaped sprays of cancrinite crystals. Location: Point of Rocks Mesa, Colfax County, New Mexico, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Cancrinite tutorial Optical mineralogy - YouTube
Two videos of cancrinite (a rare feldspathoid) in thin section, showing typical textures and optical characteristics. Supported by Boise State University and...
Cancrinite from nepheline syenite (mariupolite) of the …
2016年3月15日 · Cancrinite with typical yellow colour is an accessory component of the pegmatitic variety of mariupolite. Usually it forms irregular aggregates and veins; sometimes it is accompanied by single crystals of calcite, sodalite, natrolite and K-feldspars, filling also fractures within large crystals of nepheline and K-feldspars (Fig. 1). Locally ...
Cancrinite – Knowledge and References – Taylor & Francis
Cancrinite is a mineral composed of hydrated and anhydrous alkaline silicates, with a chemical formula of Na6Ca2Al6Si6O24 [CO3]2. It is a product of the Bayer process and can dissociate into sodium aluminate, sodium silicate, and sodium aluminosilicate. Its thermodynamic properties include a kTm of 1.36 (1; RT).
Cancrinite --MIROFOSS--
Cancrinite is generally used as a lapidary mineral. Cancrinite is found in metamorphic rocks and in contact zones between limestone and igneous intrusives. Cancrinite is a complex carbonate and silicate of sodium, calcium and aluminium. It is classed as a member of the feldspathoid group of minerals; the alkali feldspars that are poor in silica.
Cancrinite-group minerals: Crystal-chemical description and …
2016年2月1日 · The experiments at high pressure on the cancrinite-group minerals show a high-P stability, at least up to 7–8 GPa (at room-T), which is quite surprising if we consider their microporous nature. The P -induced stability is the effect of a pronounced structural flexibility, which in turn is based mainly on tilting of rigid tetrahedra around O ...