phlogopite

American  

[flog-uh-pahyt] / ˈflɒg əˌpaɪt /

noun

1. a magnesium-rich mica mineral, usually yellowish-brown, but sometimes reddish-brown.

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phlogopite British  

/ ˈflɒɡəˌpaɪt /

noun

1. a brownish mica consisting of a hydrous silicate of potassium, magnesium, and aluminium, occurring principally in metamorphic limestones and ultrabasic rocks. Formula: KMg 3 AlSi 3 O 10 (OH) 2 See also mica

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phlogopite Scientific  

/ flŏg′ə-pīt′ /

1. A yellow to dark-brown mica. Phlogopite is monoclinic and is usually found in limestone. It is used in insulation. Chemical formula: K(Mg,Fe) ₃ AlSi ₃ O ₁₀ (OH) ₂.

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Etymology

Origin of phlogopite

1840–50; < Greek phlogōp ( ós ) fiery-looking ( phlog-, stem of phlóx flame + ōp ( ḗ ) view, look + -os adj. suffix) + -ite ¹

Example Sentences

The phlogopite mica of Canada occurs in pyroxenite dikes.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)

Closely allied to the chlorites is another group of micaceous minerals known as the vermiculites, which have resulted by the alteration of the micas, particularly biotite and phlogopite.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" by Various

The magnesia-micas are now referred to the species biotite and phlogopite, which differ in that the former contains a considerable but widely varying amount of iron.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Slice 7 "Bible" to "Bisectrix" by Various

Other rock-forming minerals are the large family of micas, with names like muscovite and phlogopite.

From Let's Collect Rocks and Shells by Shell Union Oil Corporation