{"category": "system.chemical", "references": [{"citation": "The Synthesis, Microstructure and Physical Propert    ies of H    igh Purity Mullite, B.L. Metcalfe and J.H. Sant, Transactions of the British Ceramic Society, V    ol. 74, pp. 193-201     (1975), published by British Ceramic Society."}], "licenses": [{"name": "NIST_SRD-30"}], "uid": "1C157D7E41D09FF70410DBD    8352A9F20", "names": ["Mullite"], "properties": [{"name": "Chemical Family", "scalars": [{"value": "Al-Si-O"}]}, {"name": "Cr    ystallinity", "scalars": [{"value": "Polycrystalline"}]}, {"nam    e": "Elastic Modulus", "scalars": [{"value": "214"}, {"value": "220"}, {"value": "214"}, {"value": "207"}, {"value    ": "211"}, {"value": "195"}, {"value": "204"}, {"value": "202"}, {"value": "2    02"}, {"value": "188"}, {"value": "177"}, {"value": "160"}, {"value": "157"}, {"value": "156"}, {"value": "134"}], "units": "GPa", "conditions": [{"name": "Porosity", "scalars": [{"value": "0.17"}, {"value": "0.24"}, {"value": "1.0"}, {"value": "2.5"}, {"va    lue": "2.8"}, {"value": "2.8"}, {"value": "3.9"}, {"value": "4.0"}, {"value": "4.2"}, {"value": "6.1"}, {"value": "8.2"}, {"value        ": "10.0"}, {"value": "11.7"}, {"value": "12.0"}, {"value": "12.0"}], "units": "%"}]}], "preparation": [{"name": "Sint    ering"}], "chemicalFormula": " 3Al$_{2}$O$_{3}\\cdot$2SiO$_{2}$"}