He mineral ʻole ka Kaolin, he ʻano lepo a me ka pōhaku lepo i haku ʻia me nā mineral lepo hui Kaolinite. Ma muli o kona ʻano keʻokeʻo a palupalu, ua kapa ʻia hoʻi ʻo ia ʻo ka lepo Baiyun. Ua kapa ʻia ʻo ia ma muli o ke kauhale ʻo Gaoling ma Jingdezhen, Jiangxi Province.

He keʻokeʻo kona kaolin maʻemaʻe, palupalu a like me Mollisol, me ka plasticity maikaʻi, ke kū'ē i ke ahi a me nā waiwai kino a me nā kemika ʻē aʻe. ʻO kona ʻano minerala he Kaolinite, halloysite, hydromica, Illite, Montmorillonite, quartz, feldspar a me nā minelala ʻē aʻe. Hoʻohana nui ʻia ʻo Kaolin i ka hana pepa, nā keramika, a me nā mea refractory, ukali ʻia e nā uhi, nā mea hoʻopihapiha rubber, nā glazes enamel, a me nā mea maka sima keʻokeʻo. Hoʻohana ʻia kahi liʻiliʻi i ka plastic, ka pena, nā pigments, nā huila wili, nā penikala, nā mea hoʻonani o kēlā me kēia lā, ke kopa, nā pesticides, nā lāʻau lapaʻau, nā lole, ka petroleum, kemika, nā mea kūkulu hale, ka pale aupuni, a me nā ʻoihana ʻoihana ʻē aʻe.

Ua haku ʻia nā minelala Kaolin me Kaolinite, dickite, pōhaku momi, halloysite a me nā minelala hui Kaolinite ʻē aʻe, a ʻo ka ʻāpana minelala nui ʻo Kaolinite.

ʻO ke ʻano kemika Crystal o Kaolinite he 2SiO2 ● Al2O3 ● 2H2O, a ʻo kona ʻano kemika Theoretical he 46.54% SiO2, 39.5% Al2O3, 13.96% H2O. No nā minelala Kaolin ka silicate papa ʻano 1:1, a ʻo ke kristal ua haku nui ʻia me ka silica tetrahedron a me ka alumina Octahedron. Hoʻopili ʻia ka silica tetrahedron ma ke kuhikuhi ʻelua-dimensional ma ka kaʻana like ʻana i ke kihi vertex e hana i kahi papa grid hexagonal, a ʻo ka oxygen piko i kaʻana like ʻole ʻia e kēlā me kēia silica tetrahedron e kū pono ana i hoʻokahi ʻaoʻao; ʻO ka papa ʻāpana ʻano 1:1 ua haku ʻia me ka papa silicon oxide tetrahedron a me ka papa alumini oxide Octahedron, e kaʻana like ana i ka oxygen piko o ka papa silicon oxide tetrahedron.