TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Parameters: The microparticles have primary particle with average particle diameter of 40-100 nm. The ordered structure of microparticles is a quasi-crystalline structure which may be body-centered cubic, face-centered cubic or hexagonal closest packed structure. The composition has value of lattice space (d) obtained by small angle X-ray scattering measurement of d=0.45 Dave( pi /F)1/3 to 0.55 Dave( pi /F)1/3. The cured material has 30-230 degrees C linear expansion mean coefficient of less than or equal to 60 ppm (preferably less than or equal to 40 ppm); storage elastic modulus of not less than 5x 109 Pa and not less than 1.5x 109 Pa measured on frequency of 1 Hz at 30 degrees C and 250 degrees C respectively; loss tangent tan delta variation of less than or equal to 0.03 measured on frequency of 1 Hz at 30-230 degrees C; 500 nm wavelength light transmittance of greater than or equal to 85%; haze of not greater than 1%; and retardation value of less than or equal to 20 nm in viewing angle of not greater than 50 degrees . The cured material is molded by sheet form and has thickness of 50-2000 mu m. Preferred Components: The composition also contains silane compound of formula CH2=C(R5)-CO-O-(-CH2-)q-SiR6r(OR7)3-r (3), silane compound which has alicyclic structure and/or tert. amine compound. Compound (3) is gamma -(meta) acryloxypropyl dimethyl methoxysilane, gamma -(meta) acryloxypropyl methyl dimethoxysilane, gamma -(meta) acryloxypropyl diethyl methoxysilane, gamma -(meta) acryloxypropyl ethyl dimethoxysilane and/or gamma -(meta) acryloxypropyl trimethoxysilane.R5=H or Me;R6=1-3C alkyl or Ph;R7=H or 1-10C hydrocarbon residue;q=1-6; andr=0-2.The silane compound which has alicyclic structure is compound of formula (4). Compound (4) is cyclohexyl dimethyl methoxysilane, cyclohexyl methyl dimethoxysilane, cyclohexyl diethyl methoxysilane, cyclohexyl ethyl dimethoxysilane and/or cyclohexyl trimethoxysilane.R8=1-3C alkyl or Ph;R9=H or 1-10C hydrocarbon residue;s=0-6;t=0-2.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The compound which has functional group has an alicyclic structure, and is a (meth)acrylate having greater than or equal to 2 functional groups which is compound of formula (1) and/or formula (2). The tert. amine compound is N,N-dimethyl amino ethyl (meth)acrylate.R1,R2=H or Me;a=1 or 2;b=0 or 1;X=H, CH3, CH2OH, NH2, CH2-O-CO-C(CH3)=CH2 or CH2-O-CO-CH=CH2;R3,R4=H or CH3; andP=0 or 1.