Margarite

This article refers about a member of the mica group, and should not be confused with "margarita".

Margarite
Margarite from the Wright Mine, Chester Emery Mines, Chester, Hampden County, Massachusetts, USA. Size: 4.8 x 3.4 x 2.6 cm.
General
Category	Micas (phyllosilicates)
Chemical formula	CaAl2(Al2Si2)O10(OH)2
Strunz classification	09.EC.30

Margarite is a calcium rich member of the mica group of the phyllosilicates with formula: CaAl₂(Al₂Si₂)O₁₀(OH)₂. It forms white to pinkish or yellowish gray masses or thin laminae. It crystallizes in the monoclinic crystal system. It typically has a specific gravity of around 3 and a Mohs hardness of 4. It is translucent with perfect 010 cleavage and exhibits crystal twinning.

It occurs commonly as an alteration product of corundum, andalusite and other aluminous minerals. It has been reported as forming alteration pseudomorphs of chiastolite along with muscovite and paragonite. The margarite in this occurrence forms preferentially along the dark graphite rich inclusions with the chiastolite crystals.

References

• Deer, W.A., R.A. Howie, and J. Zussman (1963) Rock-forming minerals, v. 3, Sheet Silicates, p. 95-98.
• Mindat with location data
• Webmineral data
• Mineral Data Publishing PDF

This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it.v · Categories: Silicate mineral stubs Monoclinic minerals Mica group Wikimedia Foundation. 2010. Игры ⚽ Поможем написать реферат Synonyms: Pearl Leonardo dos Santos Kothari Look at other dictionaries: Margarite — Mar ga*rite, n. [L. margarita, Gr. ? a pearl; cf. F. marguerite.] 1. A pearl. [Obs.] Peacham. [1913 Webster] 2. (Min.) A mineral related to the micas, but low in silica and yielding brittle folia with pearly luster. [1913 Webster] …   The Collaborative International Dictionary of English Margarĭte — (Margaritum), in der griechischen Kirche das Gefäß, worin die geweihte Hostie aufbewahrt wird …   Pierer's Universal-Lexikon Margarīte [1] — Margarīte, perlschnurartig gestaltete Kristalliten (s. d.) …   Meyers Großes Konversations-Lexikon Margarīte [2] — Margarīte, in der griech. Kirche (margaritis) das Gefäß, in dem die geweihte Hostie aufbewahrt wird; auch (margaritae) die Stückchen einer geweihten Hostie, die der Priester für Kranke in einem besondern Gefäß aufbewahrt …   Meyers Großes Konversations-Lexikon margarite — a pearl, late Old English, from L.L. margarita (see MARGARET (Cf. Margaret)). Figuratively, that which is precious or excellent, a priceless quality or attribute; also used as an epithet for Christ, Mary, etc., late 13c. Also margerie (mid 14c.) …   Etymology dictionary margarite — s. f. [Mineralogia] Silicato de cálcio e alumínio (mineral).   ♦ Grafia no Brasil: margarita …   Dicionário da Língua Portuguesa margarite — [mär′gə rīt΄] n. [OFr < L margarita: see MARGARET] Obs. a pearl …   English World dictionary margarite — ˈmärgəˌrīt noun ( s) Etymology: Middle English, from Middle French, from Latin margarita, from Greek margaritēs, from margaron pearl (probably from Sanskrit mañjara pearl, cluster of blossoms) + itēs ite …   Useful english dictionary Margarite Frances Baird — was also known as Peggy Baird, Peggy Johns and Peggy Cowley. She was a landscape painter, but was most significant for her participation in the literary and artistic life of her day. She was married to Orrick Johns about 1915, traveled with him… …   Wikipedia margarite — noun Etymology: Middle English, from Anglo French, from Latin margarita, from Greek margaritēs Date: 13th century archaic pearl …   New Collegiate Dictionary 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”