74 EARTHS. PONDEROUS. 8. Stiontu. 
Hoiica, In 4- Tided tables or prifms, one end running into a needle 
point, and not united. 
Found in the mines of ScetlanJ, near Strotstsaa, and is diftin' 
guilhed by its iarger cryftals. 
8, STRONTIA. Confifts of ftrontian earth com- 
bined with acids : feparates from a faturated fo- 
iution in nitric acid, in the form of rhomboidal 
cryftals: totally foluble in nitric and muriatic 
acids, with effervcfcence : does not melt in 
ftrong heat, but dilcovers a bright phofphorel- 
cent light. 
carbermta. Combined with carbonic acid. 
Carbonate of Strontia. Sonnierhy Bril, min, tab, 6j. 
Stronthianite. Kinuan miner, t.^. 332. 
Strontionit. Sebmeifjer miner, l,p, 263. 
Carbonat of Strontian. Ilxmfin cbtm, 3. p. 624. 
Found in the lead mine of Strontian in Arplelhirtt in granite 
rocks, accompanied by Galena and Witherite, generally in 
amorphous malTes, or in a ftate of cryiUllization : colour 
whitifh-green ; has Tome luftre, and a little tranfparency t 
when expofed to heat it does not crackle or fplit, but before 
the blow-pipe becomes white and opake: with borax it ef- 
fervefces and melts into a colourlefs tranfparent glafs : it i* 
foluble in 200 parts of water, at a temperature of 60 deg. its 
folution tinges flame red ; its crylialsare contufcdly grouped, 
and more or iefs diverging from a centre, and are ufually 6- 
lided prifms, terminated by 3-fided pyramids,: fpccific grS' 
vity from 3,400. to 3,644. contains firontia 62. carbonb' 
acid 30. water 8 . PelUtUr, 
stdphata. Combined with fulphuric acid, 
Sulphat of Strontian. Celelline. Thomfonebem, 
1. Opake, brittle, corapafl, fomewhat fplintery, in round pieces. 
Earthy fulphat of Strontian. Thomfin <hem. p.bz^. 
Found at MontmarU rear Paris, of a blueilh.grey colour, with* 
outlulire: fpecific gravity 3,5. contains fulphat of llrontiaS 
91,42. carbonate of lime 8,33. oxyae of iron 9, zj* 
V mqstelin. 
2. Fibrous, with the fibres ftraight, fomewhat tranfparent. 
Fibious fulphat of Strontian. Thom/on chem. 3, p. 625. 
Found ill many parts of Britain and Europe, in uialles; colour 
pale bine, redoiln, or white; externally it has little or tiO 
lullre, internally filming : fpecific gravity 3,83. 
