FUSIBILITY AND HAKDNKSS MKLOW 5 671 



low, brown, rod ; Pearly; Cl. pinacoidal; H. 3.5-4; 



G. 2.36; F. 3; V; p. 483. 

 Gmelinite, (Na.Ca)Al a (Si< ) : ,),.r, H,O ; White, yellow, 



flesh-red; Cl. prismatic; H. 4.5; G. 2.10; F. 3; 



III ; Rhomhohedral. 

 Epistilbite, H 4 (Ca.Na 2 )Al J (SiO,) 9 3 H 2 O ; White ; Cl. 



pinacoidal ; H. 4-4.5 ; G. 2.25 ; V. 

 ft. Fuses quietly. 

 DEWEYLITE, H 4 Mg4(SiO 4 )3.4 H 2 O ; Yellow, brown, 



apple-green, resinous; H. 2.5-4; G. 2.40; F. 4-5; 



Amorphous. 

 6. Gelatinizes in HC1. 



. Shows calcium ; b, p. 566. 



Gyrolite, H 2 Ca2(SiO 3 ) 3 .H 2 O ; White ; H. 3.4 ; F. 3 ; 



Radiated. 

 Okenite, H 2 Ca(SiO 3 )2.H 2 O ; White, cream, bluish white ; 



Dull ; H. 4.5-5 ; G. 2.28 ; F. 2.5-3 ; Fibrous, compact. 

 ft. Becomes blue with cobalt solution. 

 LAUMONTITE, (Ca, (A1.2 OH) 2 (Si 2 O 6 )2 H 2 O ; White 



to gray; H. 3.5-4; G. 2.30; F. 2.5; V; p. 479. 

 Gismondite, (Ca.K 2 )Al 2 (Si0 3 ) 4 .4 H 2 O ; White ; H. 4. 5 ; 



G. 2.26 ; F. 3 ; V. 

 Levynite, CaAl(A1.2OH)(SiO 3 ) 3 .4 H 2 O ; White, gray 



red; H. 4.5; G. 2.13; F. 2.5; III. 

 y. The dilute HC1 solution yields a precipitate with 



H 2 SO 4 (barium). 

 Edingtonite, BaAl(A1.2OH)(SiO 3 ) 3 .2H 2 ; White, 



pink ; Cl. prismatic ; H. 4.5-5 ; G. 2.77 ; F. 2.5 ; IV. 

 8. Shows magnesium with cobalt solution ; p. 567. 

 Spadaite, H 2 Mg 5 (SiO 3 ) 6 .3 H 2 O ; Flesh-red; Pearly; 



H. 2.5 ; F. 4 ; Massive. 

 c. Not soluble or decomposed in HC1. 



. Yields a red flame with lithium flux (lithium). 

 LEPIDOLITE, LiKAl(OH.F) 2 Al(SiO 3 ) 3 ; Lilac, grayish 



white ; Pearhy ; Cl. Basal ; H. 2.5-4 ; G. 2.85 ; 2 ; V ; 



p. 495. 

 Cookeite, Li(A1.2OH) 3 (SiO 3 ) 2 ; White; Pearly; Cl. 



basal ; H. 2.5 ; G. 2.65 ; F. 4 ; V. 

 ft. Decomposed with hot concentrated HuSC^ ; all mica- 

 ceous. 

 *. Shows potassium. 



