Chiastolite

The mineral chiastolite is a variety of andalusite with the chemical composition Al₂SiO₅. It is noted for distinctive cross-shaped black inclusions of graphite. In areas around Georgetown, California, metamorphosed sediments contained andalusite and chiastolite in a graphite rich metasediment. The chiastolite crystals have been pseudomorphically altered by a mixture of muscovite, paragonite and margarite. The calcium rich margarite tends to form along the graphite rich crosses or bands within the chiastolite. Mineralogically the occurrence is important because all three white mica phases are present in an equilibrium assemblage.

References

• Mindat with location data
• Margarite pseudomorphs after chiastolite in the Georgetown area, California, Am. Mineralogist 1979 PDF

This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it.v · Categories: Aluminium minerals Nesosilicates Orthorhombic minerals Silicate mineral stubs Wikimedia Foundation. 2010. Игры ⚽ Нужно решить контрольную? No. 8 Hose Station Order of the Red Eagle Look at other dictionaries: Chiastolite — Chi*as to*lite (k[ i]*[a^]s t[ o]*l[imac]t), n. [Gr. chiasto s marked with a [chi] + lite. See {Chiasm}. So called from the resemblance of the cross cuts of its crystals to the Greek letter [chi].] (Min.) A variety of andalusite; called also… …   The Collaborative International Dictionary of English chiastolite — /kuy as tl uyt /, n. a variety of the mineral andalusite having cruciform carbonaceous inclusions. [1795 1805; alter. of chiastolith (see LITE), equiv. to Gk chiastó(s) set crosswise (see CHIASMA) + LITH] * * *       a variety of the mineral… …   Universalium chiastolite — noun An aluminosilicate mineral having carbon inclusions, a variety of andalusite. Syn: macle …   Wiktionary chiastolite — [kʌɪ astəlʌɪt, kɪ ] noun a variety of the mineral andalusite containing dark carbonaceous inclusions giving a cross shaped appearance. Origin C19: from Gk khiastos arranged crosswise + lite …   English new terms dictionary chiastolite — chi·as·to·lite …   English syllables chiastolite — /kaɪˈæstəlaɪt/ (say kuy astuhluyt) noun a variety of andalusite, a section of which often exhibits the form of a cross. {variant of chiastolith; see chiasma, lith} …   chiastolite — kīˈastəˌlīt noun ( s) Etymology: German chiastolith, from chiasto + lith lite : a mineral consisting of a variety of andalusite whose crystals have a tessellated appearance in cross section due to the arrangement of impurities called also macle …   Useful english dictionary macle — Chiastolite Chi*as to*lite (k[ i]*[a^]s t[ o]*l[imac]t), n. [Gr. chiasto s marked with a [chi] + lite. See {Chiasm}. So called from the resemblance of the cross cuts of its crystals to the Greek letter [chi].] (Min.) A variety of andalusite;… …   The Collaborative International Dictionary of English 12183-80-1 — Andalousite Andalousite Catégorie IX : silicates Andalousite Tyrol Autriche (7,4x6,2cm) …   Wikipédia en Français Andalusite — Andalousite Andalousite Catégorie IX : silicates Andalousite Tyrol Autriche (7,4x6,2cm) …   Wikipédia en Français 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”