Expantion in size
Thank you for your answer. Not being a calculus wonder I need to mull this over. However, I took the plunge and placed them well apart. Their growth was actually not so far off as I calculated in my question. I used the fire scheme that was provided but had an awfull lot of small bubbles on the surface. I do not think it was devitrification though. Tomorrow I will do my second firing and keeping my fingers crossed. Thanks again!