{TAIL ~ The material} has {HEAD ~ a monoclinic crystal structure} and the following general formula:where:0.05<=L<=1.030.05<=C<=0.200.11<=A<=0.200.01<=M=0.60 
{ TAIL ~ The material } has { HEAD ~ a monoclinic crystal structure } and the following general formula : where:0.05<=L<=1.030.05<=C<=0.200.11<=A<=0.200.01<=M=0.60
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH