Recent content by dadon

Hi all, I need some help on the ternary phase diagram. What I'm trying to do is get a binary phase diagram from the ternary phase diagram, like the one shown in the first picture. I been set a question of getting the phase BO (second picture), not the usual AB, BC etc.. How do I construct...

Hi All.. I'm having some trouble trying to understand the Kroger-Vink notation.. the following example is of donor doping (for semi conductor, extrinsic).. the first equation is meant to be elecronic compenstaion while the bottom equation is ionic compensation

Thanks for your reply :) No need to apologise.. Your help was much appreciated.

Hey All.. I found the answer I worked it out... found a useful site so thought I will share :) Very good for crystal structures.. exactly what I needed to help visualise the stuff.. Heres the link: http://firstyear.chem.usyd.edu.au/calculators/solid_state.shtml?tab=2 The answer to my...

How to you determine no. of octahedral/tetrahedral voids around sphere.. (2*3=6 oct, 2*3+1+1=8 tet) What is the best way to visualise this?

Thanks now I understand what you meant :).. I wasn't dividing! silly mistake .. and rather counting all the circles.. thanks again for that.. but now I'm still confused on the 2*3=6 octahedral voids and 2*3+1+1=8 tetrahedral voids.. lol sorry

Thanks I found the website useful.. No I don't have a textbook just some notes..but I need to understand the basics before I move on to different structures rock salt, zinc blende etc.. I have also come across this a few times in internet searches (from the link).. "the particular sphere...

maybe the question should be how do you find the number of voids for tetrahedral/octahedral around sphere...? (but then why are there 12 white circles in the fcc...and not 6 whereas the tetrahdral there are 8..) arghh I'm confusing myself! not sure if I'm making sense sorry

defects in the materials..?

Thank you for your reply.. My understanding of the topic is very brief so bare with me.. Firstly I'm not sure about the difference between the red and white.. The FCC e.g. you have given is an octahedral site From my understanding of per unit cell for fcc is 4 and bcc is 2.. the way i...

Hey All.. I'm having some problems trying to understand the tetrahedral and octahedral sites in face centered cubic (fcc) and body centered cubic (bcc). It is hard to visualise the structures in 3D.. I wanted to know how to find out the positions per unit cell for the tetrahedral and...