Gaylussite

Gaylussite

Infobox mineral
name = Gaylussite
category = Carbonate mineral
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formula = Na2Ca(CO3)2·5H2O
molweight =
color = Colorless, white, yellow, and grey
habit = Tabular prismatic crystals also granular
system = Monoclinic 2/m
twinning =
cleavage = perfect [110]
fracture = Conchoidal, brittle
mohs = 2.5
luster = vitreous
refractive = nα = 1.444 nβ = 1.516 nγ = 1.523
opticalprop = Biaxial (-)
birefringence = δ = 0.079
pleochroism =
streak = white
gravity = 1.93 - 1.99
density =
melt =
fusibility =
diagnostic =
solubility = decomposes in water
diaphaneity =
other = efflorescent
references = http://rruff.geo.arizona.edu/doclib/hom/gaylussite.pdf Handbook of Mineralogy] http://www.mindat.org/min-1662.html Mindat] http://webmineral.com/data/Gaylussite.shtml Webmineral]

Gaylussite is a carbonate mineral, a hydrated sodium calcium carbonate, formula Na2Ca(CO3)2·5H2O. It occurs as translucent, vitreous white to grey to yellow monoclinic prismatic crystals. It is an unstable mineral which dehydrates in dry air and decomposes in water.

It is formed as an evaporite from alkali lacustrine waters. It also occurs rarely as veinlets in alkalic igneous rocks.

It was first described in 1826 for an occurrence in Lagunilla, Mérida, Venezuela. It was named for French chemist Joseph Louis Gay-Lussac (1778-1850).

References


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Look at other dictionaries:

  • Gaylussite — Gay lus*site , n. [Named after Gay Lussac, the French chemist.] (Min.) A yellowish white, translucent mineral, consisting of the carbonates of lime and soda, with water. [1913 Webster] …   The Collaborative International Dictionary of English

  • gaylussite — /gay leuh suyt /, n. a rare mineral, hydrated carbonate of sodium and calcium. [1826; named after J. L. GAY LUSSAC; see ITE1] * * * ▪ mineral  a carbonate mineral, hydrated sodium and calcium carbonate [formulated Na2Ca(CO3)2·5H2O], that… …   Universalium

  • gaylussite — geiliusitas statusas T sritis chemija apibrėžtis Mineralas. formulė Na₂Ca[CO₃]₂·5H₂O atitikmenys: angl. gaylussite rus. гейлюссит …   Chemijos terminų aiškinamasis žodynas

  • gaylussite — noun A saline evaporite, consisting of a mixed sodium and calcium carbonate, with the chemical formula NaCa(CO) middot;5HO …   Wiktionary

  • gaylussite — (ghè lu si t ) s. f. Terme de minéralogie. Nom du carbonate double de chaux et de soude. ÉTYMOLOGIE    Gay Lussac, célèbre chimiste …   Dictionnaire de la Langue Française d'Émile Littré

  • gaylussite — gay·lus·site …   English syllables

  • gaylussite — ˈgāləˌsīt noun ( s) Etymology: French, from J. L. Gay Lussac + French ite : a mineral Na2Ca(CO3)2.5H2O consisting of a yellowish white translucent hydrous carbonate of calcium and sodium …   Useful english dictionary

  • Gaylussit — Chemische Formel Na2Ca[CO3]2 • 5 H2O Mineralklasse Carbonate 5.CB.35 (8. Auflage: V/D.02 60) (nach Strunz …   Deutsch Wikipedia

  • Gaylussita — General Categoría Minerales carbonatos y nitratos Clase 05.CB.35 (Strunz) Fórmula q …   Wikipedia Español

  • List of minerals F-J (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

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