phlogopite

American

[flog-uh-pahyt] / ˈflɒg əˌpaɪt /

noun

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

phlogopite British

/ ˈflɒɡəˌpaɪt /

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

phlogopite Scientific

/ flŏg′ə-pīt′ /

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.

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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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 Project Gutenberg

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 Project Gutenberg

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

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023