2 Tenth Supplement to Dana's Mineralogy. 



r Retzbanya, to which he gives the name szaibeli/ite. The structu 





le (Suppl. IX,) ^ . ^ ^ ^^__^^ 



tMs vanety of^ gTay**cnpper resembles^iro'n-'tnTites'^except^irat its co°or is^steel-gray- | 



with greenisli reflections. It is amorphous and compact. Mean of three analyse* i 



of the Val Godemar mineral, after excluding from 4-7 to 10-10 pr. ct. of quMW- j 



Cu Pb S Ye As Sb __ 



giving the formula 3Cu,S4-2Sb, Ss + PbS-f-Fea Asg, while that from Ard'Ja^ | 

 gave 3CU2 S+SSb^ Sj+Pb S+F"e As. Both varieties contained silver ; ttot 

 Ardillats, 0-05 to 0->l pr. ct., aad from Val Godemar, 08 to 1 1 pr. ct. j 



Texalite.—See Beccite. 



Topaz [p. 259, IVj.- Analyses of topaz, by H. St. Claire DeviUe {Cmptt^ R^' 



Si il Si Fl __ ^^ 1 



Thitomite [p. 319, III].-F. P. MoIIer has analyzed this mtaeral in Prof. B'ln 

 Laboratory, with following results. G.=4-26 : Si 15-38, Sn 074, Ta Zr 3 63, ^ 

 Mn 0-49, Pe 2-27, SllSl, 6e 10 66, La Di 44-05, Y 042, Ca 641, Ba 0-19. - 

 Sig 0-16. K210.NaOo6.fi 5-63=9949 



^yXt\on of^'S^LtS^'miTerVives theTrmuk sl^Si'+S s1^+6fi.-'^«»- ^'"^' 



UaAsiTE [p. 430, IV.]— Des Cloizeaux has already shown, by optical f^a^l"' ^^. 

 «iat uranite and ehaholite belong to dififerent crystalline systems, u""^"!?^^ che^i«J 

 composition of these two minerals, and fil^^hat the uranite of Autun, wbeo *»■ 



