54 Qualitative Tests. 
QUALITATIVE TESTS OF MINERALS. 
ALUMINOM, Al. 
WITH THE BLOWPIPE. 
With Soda.—Swells and forms an infusible com- 
pound. 
With Borax or S. Ph.—Clear or cloudy, never opa- 
que. 
With Cobalt Solution.—Fine blue when cold. (Cer- 
tain phosphates, borates and fusible silicates become 
blue in absence of alumina.) 
IN THE WET WAY. 
1. Alkali hydroxides precipitate grayish-white, 
Al:(HO)e«, soluble in fixed alkali-hydroxides, but only 
slightly soluble in NH:OH if NH:Cl is present. 
2. Basic acetate of aluminium is precipitated by 
addition of NaC:H:O2 to a warm and slightly acid solu- 
tion. 
Confirm.—By blowpipe test. 
AMMONTA, NH. 
WITH THE BLOWPIPE. 
In Closed Tube.—Evolution of gas with the char- 
acteristic odor. Soda or lime assists the reaction. The 
gas turns red litmus paper blue, and forms white clouds 
with HCl vapor. 
ANTIMONY, Sb. 
WITH THE BLOWPIPE. 
On Coal, R. F.—Volatile white coat, bluish in thin 
layers, continues to form after cessation of blast. (This 
coat may be further tested by S. Ph. or flame.) 
With Bismuth Flu«:—On Plaster—Orange-red 
coat, made orange by (NH:):8. 
On Coal.—Faint yellow or red coat. 
In Open Tube.—Dense, white, non-volatile, amor- 
phous sublimate. The sulphide, too rapidly heated, 
will yield spots of red. 
