Strontium

strontium

celestine

strontianite

finchite

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Symbol: Sr
Strontium is an alkali earth metal; it does not occur in the native state.
Specific gravity: 2.6
Hardness: 1½
Colour: Silvery
Solubility: Strontium reacts vigorously with air to form SrO and Sr2N3; it also reacts vigorously with nitric and hydrochloric acids, forming Sr(NO3)2 and SrCl2 respectively, with the emission of hydrogen. None of the solid reaction products has been found in nature.
Melting point: 777 oC
Boiling point: 1380 oC
Abundance in the Earth's crust: 370 parts per million by mass, 87 parts per million by moles (ChC).
Abundance in the Solar System: 50 parts per billion by mass, 0.7 parts per billion by moles (ChC).
In compounds strontium is generally in the oxidation state +2, as Sr2+. Strontium and its compounds burn with a crimson flame and are used in fireworks. The principal ores of strontium are celestine and strontianite (ChC).

Strontium-bearing minerals include:

Oxides
crichtonite
delrioite
finchite
loparite-(Ce)
todorokite

Halides
acuminite
bogvadite
jarlite
jorgensenite
stenonite
tikhonenkovite

Carbonates
burbankite
calcioancylite
carbocernaite
cordylite-(La)
daqingshanite-(Ce)
khanneshite
montroyalite
olekminskite
strontianite
strontiodresserite
weloganite

Borates
tunellite

Sulphates
celestine

Phosphates
bario-olgite
belovite-(Ce)
deloneite
fluorcaphite
goyazite
lasnierite
palermoite
svanbergite

Arsenates
arsenogoyazite
oberwolfachite

Sorosilicates
lamprophyllite
piemontite-(Sr)
strontioruizite
taniajacoite
tweddillite

Cyclosilicates
strontiojoaquinite

Inosilicates
ohmilite
ferronordite

Phyllosilicates
nordite

Tectosilicates
bellbergite
brewsterite-(Sr)
chabazite-(Sr)
heulandite-(Sr)
slawsonite
stronalsite
thomsonite-(Sr)

Unclassified silicates
umbozerite



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