I just read the rules and you are right. It becomes [и] in non-stressed positions in most cases.

Look here 刹鈞瑁 闔謐釿 ?辣鱶?驫釿 鞐艨鉋 痳髀諤鴉

And here Onlinedisk - 矗? ?琿蓚蔔 ?蜍鈞.

Phonetic analysis is taught in 4th grade (to pupils of the age of 10 if I am correct).