120 
Class IV. 
Order XX. 
Crystals. 
Properties. 
ORES OF TITANIUM. 
the Pyranees *. It has been found also in Britanny 
and in Cornwall. 
GENUSI. OXIDES OE TITANIUM. 
Sp.1. Red oxide of titanium. 
Red shorl—Sagenite. 
This ore has been found in Hungary, the Pyrenees, 
the Alps, and in Britanny in France. It is generally 
crystallized. The primitive form of its crystals, ac 
cording to the observations of Mr Hauy, is a rectangu 
lar prism, whose base is a square ; and the form of its 
molecules is a triangular prism, whose base is a right 
angled isosceles triangle, and the height is to any of the 
sides of the base about the right angle as  I2 to V 5, 
or nearly as 3 : 21. Sometimes the crystals of tita 
nium are six-sided, and sometimes four-sided prisms, 
and often they are implicated together. 
Colour red or brownish red. Powder brick or orange 
red. Lustre 3. Transparency commonly o; sométimes 
1. Texture foliated. Hardness 9. Brittle. Specific 
gravity from 4.18 § to 4.2469 J. Not affected by the 
mineral acids. When fused with carbonat of potass, 
and diluted with water, a white powder precipitates, 
heavier than the titanium employed. Before the blow 
pipe it does not melt, but becomes opaque and brown. 
With microcosmic salt it forms a globule of glass, which 
appears black ; but its fragments are violet. With borax 
it forms a deep yellow glass, with a tint of brown. 
With soda it divides and mixes, but does not form a 
transparent glass. 
Ibid. 
X Jour. de Min. No Xxxii. 614. 
§ Klaprcth. 
1 Jour. de Min. Xv. 28. and xxxii. 615 
Vauquelin and Heeht.