Mineral Species containing Cesium (Cs)

Element Properties, Isotopic Compositions for Cesium

**Cesium (Cs) Element Properties**
Atomic Mass	132.9054
Atomic Number	55
Name Origins	Latin, caesius = "sky blue."
Year Discovered	1860
Discovery Credits	Discovered by R. Bunsen and G. R. Kirchoff at Heidelberg, Germany.
Remarks	Soft, shiny, gold colored metal; reacts rapidly with oxygen and explosively with water. Used as catalyst promoter, in special glasses, and in radiation monitoring equipment. The first element to be discovered spectroscopically and forms the basis for "atomic clocks" because of the ease in which the element is ionized. Diagnostic tests: In solution, cesium will give a flame test color of a beautiful sky-blue. This flame test will be contaminated with the colors of the other alkaline elements which are present in the sample. You will probably need a diffraction spectroscope to view the two blue emission lines from cesium.
References	Emsley, J., 1991; THE ELEMENTS : Sec. Ed., Clarendon Press, Oxford, 251 p.
See Also	WebElements, ChemiCool

**Naturally Occurring Isotopes**
Symbol	Isotope Mass	Isotope Nuclide Number	Isotope Number	Natural Abundance	Half-life	Half-life Units	Decay Mode	Decay Mode MeV	Decay Mode %
Cs	132.905429	133	55	100.0000%		Stable

Cesium (Cs) Minerals sorted by Descending Weight Percent

Click here for List sorted by Mineral Name

**22 Minerals containing Cesium (Cs) sorted by Descending Weight Percent**
% Cs	Mineral Name	Chemical Formula	MW
35.92 % Cs	Pautovite !	CsFe2S3	336.73
34.34 % Cs	Ramanite-(Cs) !	Cs[B5O6(OH)4]·2H2O	387.01
27.98 % Cs	Pollucite #	(Cs,Na)2Al2Si4O12·(H2O)	285.03
27.45 % Cs	Sokolovaite !	CsLi2AlSi4O10F2	484.10
24.51 % Cs	Nanpingite	Cs(Al,Mg,Fe++,Li)2(Si3Al)O10(OH,F)2	487.97
23.84 % Cs	Zeravshanite !	Cs4Na2Zr3(Si18O45)(H2O)2	2,118.63
22.25 % Cs	Avogadrite #	(K,Cs)BF4	149.35
17.63 % Cs	Mccrillisite	NaCs(Be,Li)Zr2(PO4)4·1-2(H2O)	753.75
16.36 % Cs	Margaritasite	(Cs,K,H3O)2(UO2)2V2O8·(H2O)	974.70
16.25 % Cs	Senekevichite !	CsKNaCa2TiO[Si7O18(OH)]	817.63
14.93 % Cs	Pezzottaite !	Cs(Be2Li)Al2Si6O18	658.80
13.69 % Cs	Kupletskite-(Cs)	(Cs,K)2Na(Mn,Fe++,Li)7(Ti,Nb)2Si8O26(OH)4F	1,455.85
7.89 % Cs	Londonite !	CsAl4Be4(B,Be)12O28	808.60
6.88 % Cs	Cesstibtantite	(Cs,Na)SbTa4O12	579.81
6.40 % Cs	Telyushenkoite !	CsNa6[Be2(Si,Al)18O39F2]	1,433.11
4.82 % Cs	Cesplumtantite	(Cs,Na,Ca)2(Pb,Sb+++,Sn)3Ta8O24	2,479.94
4.62 % Cs	Galkhaite	(Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12	1,727.48
4.27 % Cs	Rhodizite #	(K,Cs)Al4Be4(B,Be)12O28	778.83
3.62 % Cs	Natrobistantite	(Na,Cs)Bi(Ta,Nb,Sb)4O12	1,101.75
2.08 % Cs	Gainesite	Na2Zr2Be(PO4)4·1-2(H2O)	639.49
0.91 % Cs	Nalivkinite !	Li2NaFe++7Ti2Si8O24(OH)4F	1,309.53
0.82 % Cs	Dachiardite-Ca #	(Ca,Na2,K2)5Al10Si38O96·25(H2O)	1,792.84

( Bold - Valid Mineral Name)
(* - Mineral Name is Not IMA Approved)
(! - New Dana Classification Number Has Been Changed or Added)
(? - IMA Discredited Mineral Species Name)
(# - Grandfathered as valid)