Mineral Species containing Strontium (Sr)

Element Properties, Isotopic Compositions for Strontium

**Strontium (Sr) Element Properties**
Atomic Mass	87.62
Atomic Number	38
Name Origins	Named after Strontian, Scotland
Year Discovered	1790
Discovery Credits	Recognized as an element by A. Crawford at Edinburgh, Scotland. Isolated in 1808 by Sir Humphry Davy at London, UK.
Remarks	Silvery shiny, soft metal obtained by high temperature reduction of SrO with Al. Protected as bulk metal by oxide film but will burn in air and reacts with water. Used in special glass for TV and VDUs, in fireworks and flares to give red color. The Sr⁸⁷ isotope used in Rb-Sr age dating. Diagnostic tests: Strontium is usually detected by the crimson flame coloration in a flame test. Silicates and phosphates do not give the strontium flame. If large quantities of calcium are present, than a spectroscope can be used to distinguish the Sr coloration. Strontium compounds become alkaline (turns pink litmus paper blue with a drop of water) after ignition before a blowpipe flame with the exceptions of phosphates and silicates. Note that Ca and Mg minerals also give an alkaline reaction. In solution, the presence of strontium (in the absence of barium) is proved by the heavy white precipitate formed by the addition of dilute H₂SO₄.
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 %
Sr	81.918414	82	38	0.0000%	25.6	Days	EC	0.21	100.00%
Sr	83.91343	84	38	0.5600%		Stable
Sr	84.912937	85	38	0.0000%	64.8	Days	EC	1.08	100.00%
Sr	85.909267	86	38	9.8600%		Stable
Sr	86.908884	87	38	7.0000%		Stable
Sr	87.905619	88	38	82.5800%		Stable
Sr	88.90745	89	38	0.0000%	50.52	Days	beta -	1.492	100.00%
Sr	89.907738	90	38	0.0000%	29	Years	beta -	0.546	100.00%

Strontium (Sr) Minerals sorted by Descending Weight Percent

Click here for List sorted by Mineral Name

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**211 Minerals containing Strontium (Sr) sorted by Descending Weight Percent**
% Sr	Mineral Name	Chemical Formula	MW
0.12 % Sr	Podlesnoite !	BaCa2(CO3)2F2	379.11
0.10 % Sr	Ferrierite-Na !	(Na,K)2Mg(Si,Al)18O36·9(H2O)	2,606.68
0.10 % Sr	Lakargiite !	CaZrO3	177.87
0.08 % Sr	Kampfite !	Ba12(Si11Al5)O31(CO3)8Cl5	3,266.13
0.07 % Sr	Karupmollerite-Ca !	(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4·7(H2O)	1,185.70
0.07 % Sr	Okanoganite-(Y)	(Na,Ca)3(Y,Ce)12Si6B2O27F14	2,660.88
0.06 % Sr	Ilimaussite-(Ce)	(Ba,Na)10K3Na4.5Ce5(Nb,Ti)6[Si12O36][Si9O18(O,OH)24]O6	4,253.30
0.06 % Sr	Direnzoite !	NaK6MgCa2(Al13Si47O120)·36H2O	4,597.25
0.04 % Sr	Arrojadite-(KNa) !	KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2	2,033.01
0.02 % Sr	Stornesite-(Y) !	(Y, Ca)[ ]2Na6(Ca,Na)8(Mg,Fe)43(PO4)36	5,318.15

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