Well I am not a chemist, but the typical oxidation states (valence) of Ti
are 2, 3, & 4

http://chemistry.about.com/library/weekly/aa122002a.htm

and the most common valence for Oxygen is -2.

So to form a compound with a net charge of zero (unlike a radical)

TiO

Ti204

Ti2O3

; are all potential stoichiometric compounds with varying degrees of
likelihood of formation and stability.

Whereas

Ti205

Would seem to not be a stoichiometric compound, but would have a net charge
of -2 (most likely), -4, or -6

if it forms at all.

For a discussion of other titanium oxides try locating this European patent
abstract (Note Ti305):

Let's hear from the chemists out there, since I have exhausted my High
School chemistry knowledge.

BTW Why are you asking?

Best Regards,

Wendell McCulley

-----Original Message-----
From: mems-talk-bounces+wmcculley=earthlink.net@memsnet.org
[mailto:mems-talk-bounces+wmcculley=earthlink.net@memsnet.org] On Behalf Of
amron gary
Sent: Monday, April 19, 2010 6:13 PM
To: mems-talk@memsnet.org
Subject: [mems-talk] Is Ti2O3 stoichiometric?

Hi MEMS community members,

Is Ti2O3 stoichiometric? How about Ti2O4 and Ti2O5? I would really
appreciate if someone can explain this to me.  Any article or notes will be
good as well.

Thanks,

-Imran