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A bag of magnesium carbonate beside a bag of feldspar. Although the former weighs 25 kg (vs. 22.7 kg for the feldspar), clearly it is a dramatically lighter (per volume unit) material. Lifting that bag of Mag Carb feels like lifting a pillow!
| Materials | 
Light Magnesium Carbonate
 A refractory feather-light white powder used as a source of MgO and matting agent in ceramic glazes  | 
| Glossary | 
Ceramic Material
 Ceramic materials are employed in the ceramic industry to make glazes, bodies, engobes and refractories. We study them at the mineral, chemical and physical levels.  | 
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