^4 EARTHS. PONDEROUS, 8. Strontia. 



scGtk&» In 4-ridpd tables or prifms, one end running into a needle 



point, and not united. 

 Found in the mines of ScotlanJ^ near Strontianj and is diHin- 

 guiihed by its larger cry ftals. 



8, STRONTIA. Confifts of ftrontian earth com- 

 bined with acids: feparatcs from a faturated fo- 

 iution in nitric acid, in the form of rhomboidal 

 cryfl"als: totally foluble in nitric and muriatic 

 acids, with effervefcence : does not melt in a 

 (Irong heat, but difcovers a bright phofphorel- 

 cent light. 



carhoxata. Combined with carbonic acid. 



Carbonate of Strontia. Sowerby Brit* min, tah,6^» 



Stronthianite. Kirivan miner, i.^. 332. 



Strontionit. Schmeijjer miner. \,p. 263. 



Carbonat of Strontian. Thomfon chtm, 3. />. 624. 



Found in the lead mire of Strontian in ArgyU/hire, in granite 

 rocks, accompanied by Galena and Witherite, generally in 

 amorphous mafl'es, or in a Hate of cryftallization : colour 

 whitilh-grcen : has fome luilre, and a little tranfparency : 

 when expofed to heat it does not crackle or fplit, but before 

 the blow-pipe becomes white and opake : with borax it ef« 

 fervelces and melts into a colourlefs tranfparent glafs: it is 

 foluble in 200 parts of water, at a temperature of 60 deg. its 

 folution tinges flame red; its cryftals are confufedly grouped, 

 and more or \tk diverging from a centre, and are ufually 6- 

 fided prifms, terminated by 3-fided pyramids: fpecific gra- 

 vity from 3,400. to 3,644. contains ftrontia 62. carbonic 

 acid 30, water 8. PelUtier, 



mlphata. Combined with fulphuric acid. 



Sulphat of Strontian. Celeiline, Thom/^n chem» 3. /. 624. 



1. Opake, britde, compaft, fomev.hat fplintery, in round pieces^ 



Earthy fulphat of Strontian. Thomfon cbem 3* /». 625, 

 Found at Montmarte near Paris-, of a blueifh-grey colour, with- 

 out luftre; fpecific gravity 3,5. contains fulphat of iirontian 

 91,42. carbonate of lime 8,33. oxyde of iron 9,25. 

 Vauquelin, 



2. Fibrous, with the fibres ftraight, fomewhat tranfparent. 



Fibious fulphat of Strontian. Thomfon chem, 3. p, 625. 



Found in many parts of Britain and Europe^ in mafles; colour 

 pale blue, redailli, or white : externally it has little or no 

 luitre, inteinaii'y fhining: fpecific gravity 3,83, 



