1.I.A1) MIM.IIAI.S 847 



Plumbojarosite, Pl>|l' < 'I I i.,| fl (SO<)< ; :i dark 



piiwdrr ; ( I. .'{.(>(> ; 111. 

 (I. Lead sulphates. 



ANGLESITE, PbSO 4 ; (Jr.-iy to white; H. 3 ; G. 



IV: p. .">32. 

 Lenarkite, (Pb 2 O)SO 4 ; Pale yellow or white ; Cl. ba-al ; 



H. 2-2.5; G. 6.40; F. 2; V. 

 e. Gelatini/es \vi1li HC1. 



Roeblingite, 5 H 2 CaSiO 4 .2 (Pb.Ca)SO 4 ; White; H. 



2.5-3 ; G. 3.43 ; F. 3 ; Granular. 



4. EfYervr-rrv with lint dilute nitric acid (carborates). 

 a. Yields a chlorine reaction; a, p. 588. 



Phosgenite, (PbCl) 2 CO 3 ; White; Adamantine; Cl. 



basal; H. 3;.G. Q.2; F. 1 ; II. 

 6. Yields water in the closed tubes. 



Hydrocerussite, Pb(Pb.OH) 2 (CO 3 ) 2 ; White; Pearly; 



H. 1-2; G. 6.14; F. 1-5; III. 

 c. Yields no water. 



CERUSSITE, Pl>ro, ; White; Adamantine; H. 3-3.5; 



G. 6.55; F. 1.5; IV; p. 396. 

 Beresonite, 2 PbO.3 PbCr0 4 .PbC0 3 ; Dark red; Cl. 



perfect; G. 6.69. 



5. Yields an antimony coat in R. F. on coal. 

 a. Yields a chlorine reaction; a, p. 588. 



Nadorite, PbClSbO 2 ; Smoky to yellowish brown; 



Resinous; H. 3.5-4; G. 7.0 ; F. L5 ; IV. 

 Ochrolite, Pb 4 Sb 2 07.PbCl 2 ; Sulphur to grayish yellow ; 



F. 1.5?; IV. 

 6. Yields no chlorine. Yields water, 



Bindheimite, Sl^Oa.PbO and H 2 O ; Gray, yellow, 



brown; H. 4 ; G. 4.68; F. 3-4; Amorphous. 

 6.' The hot nitric acid solution yields a white precipitate with 



silver nitrate (chlorine); b, p. 588. 

 Cotunnite, PbCl 2 ; White ; H. 2 ; G. 5.80 ; F. 1 ; 



IV. 

 Penfieldite. 2PbCI.,.Pb<): White; Cl. basal; H. 2.5 ; 



F. 1;III. 

 Matlockite, PbClo.PbO ; Pale yellow to white; Cl. 



basal; H. 2.5-3; G. 7.20; F. 1; II. 

 Mendipite, PbCl 2 .2 PbO ; Pale yellow to white; Cl. 



prismatic; H. 2.5; G. 7.10; F. 1; IV. 



