Anosovite

Apart from the well-known titanium-dioxide phases mentioned above, other titanium oxides exists such as titanium hemioxide (Ti O), titanium monoxide (TiO), titanium ses-quioxide (Ti O,), and anosovite (TijOj). 

Anosovite [12065-65-5], chemical formula TijO, was identified by Ehrlich S in the Ti-0 binary phase diagram, in the region between 62.3 and 64.3 at.% oxygen. It can be prepared in the following ways  

By the hydrogen reduction of solid TiO at temperature around 1300°C according to the following reaction scheme  

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Anosovite (type 1) [12065-65-5] a-Ti,0, M = 223.0070 64.1 wt.% Ti 35.9 wt.% 0 (Oxides and hydroxides) Monoclinic a = 975.2 pm = 380.2 pm c = 944.2 pm =91.55 mC32 (Z= 4) S.G. C2/m Biaxial ( )= n.a. 4900 Habit needle-hke crystals. Color blue-dark. Diaphaneity opaque. Luster metallic. Streak black. Other properties melting point 1777 C It canbe prepared by the hydrogen reduction of solid TiO at temperature around 1300 C or by mixing indomtelly stoichiometric quantities of titanium metal and titanium dioxide in an electric arc furnace under argon atmo here. This oxide is dimorphic with a rapid phase transition from semiconductor to md al occuring at rou y 120 C... 

Findings from the theories of nucleation have also contributed to the optimization of these comprehensive experimental investigations. As a result, glass-ceramics with improved properties have been produced, specifically glass-ceramics with specific solid-solution limits like j3-spodumene and stuffed P-quartz or with stoichiometric compositions like cordierite and lithium disilicate. Initial results for the successfU application of the theory of nucleation to multicomponent glass-ceramics with a nonstoichiometric composition were achieved with mica and anosovite glass-ceramics. 

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