One of the mysteries of the English language finally explained.
An orthorhombic silicate of aluminium, Al₆Si₂O₁₃, that is formed by the action of high temperatures on other aluminium silicates and is used for making refractory porcelains and bricks.
1920s. From Mull, the name of an island off the west coast of Scotland where the silicate was first identified + -ite.
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