Help required with chemical formula and spectrophotometry

[spekky_bandit]

Hi guys,

I have what I hope is a simple question. basically I have a known crystal structure with a known dopant, however I don't know what the charge on the dopant is and I can't find it in any papers. Now I'm not sure if this is something I just need to find or whether this is something I can determine from analysis (I did study chmistry to the highest secondary level but I can't actually remember much of the methodology). Anyway I would appreciate if someone could tell me the charges and explain how they were oobtained for the equation below (if possible):

Lu₂SiO₅:Ce where Ce is the dopant

Additionally, this material is a scintillator and I have measure the transmission for the 200-1000nm range. In the UV region there are a couple of transmission spikes that I would not expect for a scintillator. Could this be due to the Ce dopant?

Thanks in advance.

Jamie

 

[DrDu]

Hm, when googling for"Lu2SiO5 Ce" the first link was
http://www.google.de/url?sa=t&rct=j...WhMxyIVrbdMMHfg&bvm=bv.43287494,d.bGE&cad=rja
where they determined the charge by EPR as 3+ (which was what I would have expected anyhow although 4+ would also have been a possibility).

 

[spekky_bandit]

Thanks for that DrDu. for some reason I never thought to actually search for the formula and instead used the common name LYSO. Just goes to show how easily you can overlook the obvious.