Recent content by jman1990

This could work, thanks. I found that D2SO4 isn't much more expensive than D2O so I probably will end up buying some and using that to react CaF2 to form DF + CaSO4. I am going to try this method as well and see which gives me better results.

Hello All, I am wondering if anyone knows a good synthesis for DF. I am trying to create a deuterated crystal for neutron diffraction studies (it is a hydrated crystal). The synthesis involves water and HF. I can buy D2O for the synthesis, but DF in D2O is a problem. If anyone can enlighten me...

What kind of compound are you trying to identify? Mass spec might be good for inorganic molecular complexes, powder x-ray diffraction works extremely well for crystalline solids, NMR and/or IR spectroscopy works well for organics. For $1000 I would not try to buy an instrument, you need to spend...

Nitrogen is smaller, and so has higher charge density. Also the nucleus is less shielded so electrons will feel a greater pull, which explains it's higher electronegativity.

Hello everyone, Does anyone know much about the crystal field splitting of the f orbitals in actinides, specifically uranium? I am doing research on the chemistry of uranium and have come across an interesting problem. U(IV) compounds undergo a transition to a non-magnetic singlet ground state...

Thanks for the reply. We are synthetic chemists trying to understand magnetism, so any little bit helps. He has a bit less background in quantum than I do, so unfortunately he doesn't have a guess as to what these mysterious other factors are. Could strong magnetic coupling (i.e. superexchange)...

Hey all, I am a graduate student (in chemistry) working on oxide crystals. Our group has a SQUID magnetometer which we use for magnetic property measurements. The other day a fellow student and myself got into a discussion about LS coupling and crystal electric fields. I know that CEF will...

I see, I get what you're saying. Thanks a lot for the helps, that's exactly what I need.

Thanks for the link. Okay, I'm looking at the tables. I'm guessing I want the table B.4 (superheated water vapor)? How can I use this information to back out the pressure of my system? Thanks for the help.

I am not. I am just beginning to work under these conditions and I am the first in our lab to do so, so this is pretty new to all of us.

Yes, the remaining head space is filled with air, the only water vapor present would be due to the vapor pressure at ambient conditions.

That's correct. I have a 75 mL vessel that is partially filled with water (the actual fill level varies between 50%-70% depending on the reaction). I am bringing the vessel to 400 degrees C, which is just over the critical point.

Hello All, I am doing supercritical water syntheses in a sealed reaction container. I am looking for a way to calculate the exact pressure inside the reaction vessel as a function of the fill level and the temperature. This is to make sure I stay within the safe limits of my reaction vessel.