212 



PHYSIOGRAPHY. 



Stromeyerite Strontianite. 



2. Analysis. 

 By STROMEYER. 



Sulphur 15-96 



Silver 52-87 



Copper 30-83 



Iron 0.34 



3. It is found in small masses in the mines of Schlangenberge in Si- 

 beria. 



STROMNITE. 



Massive ; composition thin columnar, and showing traces of 

 crystallization. 



Color yellowish-white internally ; on the outside where it ap- 

 pears to be disintegrated, it is greyish-white. Lustre inclining to 

 pearly, faint. Translucent. 



Brittle. Hardness =3-5. Scratches Calcareous Spar, but not 

 Fluor, Sp.gr. =3703. 



1. It effervesces with acids, but is infusible before the blow-pipe. 

 2. Analysis. 

 By TRAILL. 



Carbonate of strontita 

 Sulphate of barytes 

 Carbonate of lime 

 Oxide of iron 



68-6 

 27-5 

 2-6 

 01 



3. It occurs in veins with Galena in a kind of clay-slate, at Stromness 

 in Orkney. 



4. It seems probable that the Stromnite is a mixed mineral, consisting 

 of an intimate aggregation of Strontianite and Heavy-Spar. 



STRONTIANITE. Peritomous Hal-Baryte. 

 MOHS. 



Primary form. Right rhombic prism. M on M 117 

 32'. 



Secondary forms. 



Fig. 421. Fig. 422. 



Braundsdorf, Saxony. 



Leogang, Salzburg. 



