The scapolites (Greek: σκάπος, "rod", and λίθος, "stone") are a group of rock-forming silicate minerals composed of aluminium, calcium, and sodium silicate with chlorine, carbonate and sulfate. The two endmembers are meionite (Ca4Al6Si6O24CO3)[2] and marialite (Na4Al3Si9O24Cl).[3][4] Silvialite (Ca,Na)4Al6Si6O24(SO4,CO3) is also a recognized member of the group.[5][4][6]
^Teertstra, D. K.; Schindler, M.; Sherriff, B. L.; Hawthorne, F. C. (1999). "Silvialite, a new sulfate-dominant member of the scapolite group with an Al-Si composition near the 14/m–P42/n phase transition". Mineralogical Magazine. 63 (3): 321–329. Bibcode:1999MinM...63..321T. doi:10.1180/002646199548547. ISSN 0026-461X. S2CID 129588463.
The scapolites (Greek: σκάπος, "rod", and λίθος, "stone") are a group of rock-forming silicate minerals composed of aluminium, calcium, and sodium silicate...
Gemologist: What Are the Identifying Characteristics of Citrine, Ametrine, Smoky Quartz, and Scapolite? Archived September 5, 2006, at the Wayback Machine...
labradorite, selenite, feldspar, apatite, moonstone, thomsonite and scapolite amongst others. Chatoyancy is not limited to gemstones but can also be...
rocks. Such examples include biotite-rich zones, amphibolite-calcite-scapolite alteration and other unusual skarn assemblages. The process is called...
a form of scapolite or nepheline. Mindat.org defines the term "Gabbronite" as: Old discredited name, has been referred to as both Scapolite and Nepheline...
The Dumbarton Oaks birthing figure is a possibly Aztec scapolite figurine of a woman giving childbirth in a squatting position. Housed in the Dumbarton...
magnetite, sphalerite, chalcopyrite, skutterudite, allanite, zoisite, scapolite, titanite, and calcite along with numerous other Co–Ni sulfides and arsenides...
CO3,SO4) with increasing meionite content. Marialite is a member of the scapolite group and a solid solution exists between marialite and meionite, the...
impurities.[citation needed] Although other minerals such as tourmaline, scapolite, corundum, spinel and quartz can form "cat's eye" stones similar in appearance...
grossular-andradite garnet, calcic pyroxene, vesuvianite, epidote and scapolite. Rodingites are common where mafic rocks are in proximity to serpentinized...
cover a triangular area of two km2 (0.77 sq mi); surrounded by diopside–scapolite–feldspar calc-granulites. The pyroxenite outcrops are dark and massive...
idocrase, wollastonite, actinolite, magnetite or hematite, epidote and scapolite. Because skarns are formed from silica-rich aqueous fluids replete with...
used to refer to the chloroformates which contain the group ClC(O)O-. Scapolite is produced in nature by metasomatism, where hot high pressure water solutions...
Meionite is a tectosilicate belonging to the scapolite group with the formula Ca4Al6Si6O24CO3. Some samples may also contain a sulfate group. It was first...
are formed, such as diopside, epidote, garnet, sphene, vesuvianite and scapolite; with these phlogopite, various feldspars, pyrites, quartz and actinolite...
epidote, sericite, albite or other sodium-rich feldspar along with possibly scapolite. The use of microscopic refractive index data and X-ray diffraction patterns...
grossular-andradite garnet, calcic pyroxene, vesuvianite, epidote and scapolite. Fenite, as a variant of metasomatism associated with strongly alkaline...
of northeast Ecuador. Germany: In ejected rocks of hornblende-haüyne-scapolite rock from the Laach lake volcanic complex, Eifel, Rhineland-Palatinate...
feldspar, are chromite and other spinels, garnet, magnetite, rutile, and scapolite. Pyroxenites can be formed as cumulates in ultramafic intrusions by accumulation...
feldspar. Nepheline is very abundant and there is also cancrinite, sodalite, scapolite, calcite, biotite and hornblende. The lujaurites are distinguished from...
Archived from the original on 2024-02-06. Retrieved 2024-02-06. "Meionite". "Scapolite: A metamorphic mineral and interesting gem". geology.com. Retrieved 2024-01-23...
chrysoberyl, cordierite, corundum, garnet, kornerupine, kyanite, phlogopite, scapolite, sillimanite, spinel, and surinamite. Large crystals of fine clarity and...
gneisses (or orthogneisses), rocks occur along with them, such as marbles, scapolite limestones, and corundum rocks, which were probably of sedimentary origin...
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