Danalite

Danalite
General
Category	Sodalite - Feldspathoid
Chemical formula	Fe2+4Be3(SiO4)3S
Strunz classification	09.FB.10
Dana classification	76.02.04.02
Identification
Color	Yellow, pink, reddish brown, red: colorless to pink in thin section
Crystal habit	Octahedral and dodecahedral crystals, typically massive or as segregations
Crystal system	Isometric - hextetrahedral (4 3m)
Cleavage	{111} and {111}
Fracture	Subconchoidal to uneven
Tenacity	Brittle
Mohs scale hardness	5.5 to 6
Luster	Vitreous or greasy
Streak	Grey white
Diaphaneity	Semitransparent
Specific gravity	3.28 - 3.46
Optical properties	Isotropic
Refractive index	n = 1.747 - 1.771
References	[1][2][3]

Danalite is an iron beryllium silicate sulfide mineral with formula: Fe²⁺₄Be₃(SiO₄)₃S.

It is a rare mineral which occurs in granites, tin bearing pegmatites, contact metamorphic skarns, gneisses and in hydrothermal deposits. It occurs in association with magnetite, garnet, fluorite, albite, cassiterite, pyrite, muscovite, arsenopyrite, quartz, and chlorite.^[1]

Danalite was first described in 1866 from a deposit in Essex County, Massachusetts and named for American mineralogist James Dwight Dana (1813–1895).^[3]

It has been found in Massachusetts, New Hampshire, Sierra County, New Mexico; Yavapai County, Arizona; Needlepoint Mountain, British Columbia; Walrus Island, James Bay, Quebec; Sweden; Cornwall, England; Imalka and Transbaikal, Russia; Kazakhstan; Somalia; Tasmania; Western Australia and Hiroshima Prefecture, Japan.^[1][2]

References

1. ^ ^{a b c} http://rruff.geo.arizona.edu/doclib/hom/danalite.pdf Handbook of Mineralogy
2. ^ ^{a b} http://www.mindat.org/min-1341.html Mindat.org
3. ^ ^{a b} http://webmineral.com/data/Danalite.shtml Webmineral data

This article about a specific silicate mineral is a stub. You can help Wikipedia by expanding it.v · Categories: Sodalite group Sulfide minerals Beryllium minerals Silicate mineral stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем сделать НИР Danala Danamombe Look at other dictionaries: Danalite — Da na*lite, n. [Named after James Dwight Dana.] (Min.) A mineral occuring in octahedral crystals, also massive, of a reddish color. It is a silicate of iron, zinc manganese, and glucinum, containing sulphur. [1913 Webster] …   The Collaborative International Dictionary of English danalite — ● danalite nom féminin (de J. F. Dana, nom propre) Silicate sulfurifère naturel de fer, de zinc, de béryllium et de manganèse …   Encyclopédie Universelle danalite — da·na·lite …   English syllables danalite — ˈdānəˌlīt noun ( s) Etymology: James D. Dana died 1895 American geologist + English lite : a mineral (Fe,Zn,Mn)8Be8Si6O24S2 that consists of a reddish or gray silicate and sulfide of iron and beryllium usually containing also zinc and manganese… …   Useful english dictionary Даналит — Формула Fe2+4Be3(SiO4)3S Примесь Mn, Zn, Аl до 4,2 % Синг …   Википедия List of minerals C-E (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 Даналит — [по фам. Дэна] м л, Fe6[Sj2(BeSiO4)6]. Конечный член полного изоморфного ряда: Д. гельвин гент гельвин. См. Гельвина группа. Редкий. Геологический словарь: в 2 х томах. М.: Недра. Под редакцией К. Н. Паффенгольца и др.. 1978 …   Геологическая энциклопедия beryllium — Glucinum Glu*ci num, n. [Cf. F. glucinium, glycium, fr. Gr. ?, sweet. Cf. {Glycerin}.] (Chem.) A rare metallic element, of a silver white color, and low specific gravity (2.1), resembling magnesium. It never occurs naturally in the free state,… …   The Collaborative International Dictionary of English glucinium — Glucinum Glu*ci num, n. [Cf. F. glucinium, glycium, fr. Gr. ?, sweet. Cf. {Glycerin}.] (Chem.) A rare metallic element, of a silver white color, and low specific gravity (2.1), resembling magnesium. It never occurs naturally in the free state,… …   The Collaborative International Dictionary of English Glucinum — Glu*ci num, n. [Cf. F. glucinium, glycium, fr. Gr. ?, sweet. Cf. {Glycerin}.] (Chem.) A rare metallic element, of a silver white color, and low specific gravity (2.1), resembling magnesium. It never occurs naturally in the free state, but is… …   The Collaborative International Dictionary of English 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”