Hi everyone.
I came across with a peak at 31.6° while measuring XRD of WO3 that almost nobody else in the literature reports. Wo you have any idea of what this can be? Which crystalline phase?
Any good references would be great!
Cheers,
Pablo
Pablo Martinez Pancorbo please find attached a reference showing the XRD of tungsten trioxide. It does not show the peak at 31.6°. Thus I assume that it is due to the presence of a by-product. The question is how you prepared your WO3 sample?
Generally peak at 31.6° comes for the WC ( tungsten carbide ). It is likely to appear if there any traces of carbon in your preparation.
Dear Pablo Martinez Pancorbo ,
in addition to the answers of Frank T. Edelmann and Gourab Das I will comment as follows:
a) are there other peaks? you may share your pattern;
according to Fig. 1 of:
Article Electrochemical properties of mixed WC and Pt-black powders
this peak could be the (001) peak of WC (Gourab Das already suggested WC). But if you have WC as by-product, you should also 'see' the (100) and the (101) peaks too because they are far stronger than the (001) one.
b) what is the substrate/sample support? ( however for a sufficient thick sample containing W it is unlikely 'see' the substrate/ sample support).
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