Chevkinite

0.03 sec.

chevkinite [′chef·kə‚nīt]

(mineralogy)

(Fe,Ca)(Ce,La)₂(Si,Ti)₂O₈A mineral consisting of silicotitanate of iron, calcium, and rare-earth elements.

Chevkinite

(named after K. V. Chevkin [1802–75], chief of staff of the Corps of Mining Engineers in St. Petersburg), also tscheffkinite, a mineral.

Chevkinite, a diorthosilicate with the chemical composition Ce₄Ti₄O₈[Si₂O₇]₂, contains admixtures of Nb, Th, Ca, Sr, and Zr. It crystallizes in the monoclinic system, forming lamellar and tabular crystals. With respect to chemical composition and structure, chevkinite resembles its polymorphic modifications: orthohombic orthochevkinite and monoclinic perrierite. It is often metamict, and the crystal structure is restored after roasting. Chevkinite is pitch black in color and has a hardness of 5.5 on Mohs’ scale and a density of 4,400–4,930 kg/m³. It occurs together with ilmenite, sphene, and zircon in alkali granites, syenites, and granitic and syenite pegmatites.

Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.

?Page tools

Printer friendly
Cite / link

Feedback

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found			Chetvertakov, Ermolai Chetvertakov, Ermolai Vasilevich Cheung Chau Bun Festival Chevage Chevakinskii, Savva Chevakinskii, Savva Ivanovich cheval-de-frise chevalier Chevalier d'Entrecasteaux Chevalier Entrecasteaux Chevalier lens Chevalier, Guillaume Sulpice Chevalier, Maurice Chevalier, Michel Chevalier, Pierre Chevau-Legers Chevau-Légers Chevaux-De-Frise Cheverev, Aleksandr Cheverev, Aleksandr Mikhailovich Cheverus, Jean Louis Anne Madeleine Lefebvre de Cheves, Langdon chevet Cheviot Cheviot Hills Chevkinite Chevrel phase Chevrel phases Chevreul, Michel Eugene Chevreul, Michel Eugène Chevreul, Michel Éugène Chevreuse, Marie de Rohan-Montbazon, duchess de Chevreuse, Marie de Rohan-Montbazon, duchesse de Chevrolet, Louis Chevron chevron fold chevron pattern chevron slat chevrotain Chevy Chase Chew, Benjamin Chewa Chewacla State Park chewing chewing gum Cheyenne Cheyenne County Cheyenne Frontier Days Cheyenne Mountain Cheyenne Mountain State Park Cheyenne River			Cheven Chevening Technology Enterprise Scholarship Programme Cheventein Chever Chevera Kaddisha Cheverev, Aleksandr Cheverev, Aleksandr Mikhailovich Cheveril Cheverliize Cheverly Parent Resource Center Cheverly Young Actors Guild Cheverly-Police and Citizens Together Cheverus, Jean Louis Anne Madeleine Lefebvre de Cheves, Langdon Chevet Chevet chevets chevets Cheveux Incoiffables Cheviot Cheviot Cheviot Cheviot Hills Cheviot Hills Cheviot Hills Pony Baseball Association Cheviots Cheviots Cheviots Chevisance Chevisance Chevkinite CHEVMA Chevon Chevon Chevon Chevra Kadisha chevre chèvre Chevrel phase Chevrel phases Chevremont Chevremont Chevrette Chevreul, Michel Eugene Chevreul, Michel Eugène Chevreul, Michel Éugène Chevreuse, Marie de Rohan-Montbazon, duchess de Chevreuse, Marie de Rohan-Montbazon, duchesse de Chevrier Chevrolet Chevrolet Chevrolet Chevrolet Beretta Club Nederland Chevrolet Cadillac of Goldsboro Chevrolet Club of Norway Chevrolet Corvair Club de France Chevrolet Special Vehicle Chevrolet, Louis chevron chevron

Encyclopedia

Free Tools:	For surfers: Free toolbar & extensions \| Word of the Day \| Help For webmasters: Free content \| Linking \| Lookup box \| Double-click lookup

Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.