Meionite

Meionite
Meionite (scapolite) crystals (cross-shaped) in a quartz matrix, 7.2 x 4.0 x 3.0 cm. Worcester County, Massachusetts.
General
Category	Tectosilicate - Scapolite group
Chemical formula	Ca4Al6Si6O24CO3
Strunz classification	09.FB.15
Crystal symmetry	4/m - Dipyramidal
Unit cell	a = 12.179(1)Å, c = 7.571(1)Å
Identification
Color	Colorless, white, grey, pink, violet, blue, yellow, orange-brown, brown
Crystal system	Tetragonal
Cleavage	Distinct/good on {100}{110}
Fracture	Irregular/uneven, conchoidal
Tenacity	Brittle
Mohs scale hardness	5 - 6
Luster	Vitreous, resinous, pearly
Streak	White
Diaphaneity	Transparent, opaque
Specific gravity	2.74 - 2.78
References	[1][2][3]

Meionite is a silicate mineral belonging to the scapolite group with the formula Ca₄Al₆Si₆O₂₄CO₃. Some samples may also contain a sulfate group. It was first discovered in 1801 on Mt Somma, Vesuvius, Italy.

References

1. ^ Mindat.org
2. ^ Webmineral.com
3. ^ Handbook of Mineralogy

This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it.v · Categories: Tectosilicates Calcium minerals Silicate mineral stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать курсовую Apology of al-Kindy (book) María Kodama Look at other dictionaries: Méionite — Catégorie IX : silicates[1] Général …   Wikipédia en Français Meionite — Mei o*nite, n. [Gr. mei wn smaller. So called in a allusion to the low pyramids of the crystals.] (Min.) A member of the scapolite group, occuring in glassy crystals on Monte Somma, near Naples. [1913 Webster] …   The Collaborative International Dictionary of English meionite — /muy euh nuyt /, n. Mineral. a member of the scapolite group, rich in calcium and containing no sodium. [1800 10; < Gk meíon less + ITE1; cf. F méionite] * * * …   Universalium meionite — ˈmīəˌnīt noun ( s) Etymology: French méionite, from Greek meiōn less + French ite : a mineral Ca4Al6Si6O24(SO4,CO3,Cl2) consisting of an aluminosilicate of calcium with other anions (as sulfate, carbonate, and …   Useful english dictionary meionite — mei·o·nite …   English syllables Scapolite — (Gr. asairos , rod, stone), is a group of rock forming silicate minerals composed of aluminium, calcium and sodium silicate with chlorine, carbonate and sulfate. The variations in composition of the different members of the group may be expressed …   Wikipedia Skapolith — Skapolithgruppe Zwei violette Skapolithe auf Muttergestein mit unbekannten, grünen Kristallen Chemische Formel (Na, Ca)4(Si, Al)12O24(Cl, CO3) Mineralklasse …   Deutsch Wikipedia scapolite — /skap euh luyt /, n. 1. any of a group of minerals of variable composition, essentially silicates of aluminum, calcium, and sodium, occurring as massive aggregates or tetragonal crystals. 2. the member of the scapolite group intermediate in… …   Universalium Marialite — Catégorie IX : silicates[1] Général …   Wikipédia en Français List of minerals K-M (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”