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Phlogopite

/ˈflɒɡəpaɪt/noun

A brown magnesium mica that splits into thin flexible sheets.

The Greek roots

φλογωπός
phlogōpós
fiery-looking

Literally: fire-faced

The story of the word

Breithaupt named it in 1841 for the coppery fire that flares in a sheet held up to the light. Its root, phlox, is the plain Greek word for flame and also the name of the garden flower. The same syllable sits inside phlogiston, the fire-substance that chemists believed in until Lavoisier weighed the ash and found it heavier.

How it travelled
Ancient Greek → scientific coinage → English
First recorded
19th century

Same family

phlogistonphloxphlegm

In a sentence

Sheets of phlogopite peeled off the specimen like pages, each one bending without breaking.

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