
1) Mineral 2) Monoclinic mineral
Found on
https://www.crosswordclues.com/clue/pyrophyllite

Pyrophyllite is a phyllosilicate mineral composed of aluminium silicate hydroxide: Al2Si4O10(OH)2. It occurs in two more or less distinct varieties, namely, as crystalline folia and as compact masses; distinct crystals are not known. The folia have a pronounced pearly lustre, owing to the presence of a perfect cleavage parallel to their surfaces: ...
Found on
http://en.wikipedia.org/wiki/Pyrophyllite

• (n.) A mineral, usually of a white or greenish color and pearly luster, consisting chiefly of the hydrous silicate of alumina.
Found on
http://thinkexist.com/dictionary/meaning/pyrophyllite/

very soft, pale-coloured silicate mineral, hydrated aluminum silicate, Al2(OH)2 Si4O10, that is the main constituent of some schistose rocks. The ... [3 related articles]
Found on
http://www.britannica.com/eb/a-z/p/138
Py·roph'yl·lite noun [
Pyro- + Greek ... leaf.]
(Min.) A mineral, usually of a white or greenish color and pearly luster, consisting chiefly of the hydrous silicate of alumina.
Found on
http://www.encyclo.co.uk/webster/P/205

Pyrophyllite is a comparatively rare mineral found in metamorphic rocks and often with kyanite. It is a hydrous silicate of aluminium with the formulae A12Si4O10(OH)2 and a relative hardness of 2. It appears very similar to talc. Pyrophyllite is used industrially as a refractory mineral, as a filler for rubber, in paints and in insecticides.
Found on
http://www.probertencyclopaedia.com/browse/HP.HTM

[
n] - a white or greenish aluminum silicate mineral (resembles talc)
Found on
http://www.webdictionary.co.uk/definition.php?query=pyrophyllite
noun a white or greenish aluminum silicate mineral (resembles talc)
Found on
https://www.encyclo.co.uk/local/20974

a phyllosilicate, AlSiO(OH), usually having a white or greenish color, and occurring in either foliated or compact masses, the latter variety being used like soapstone.
Found on
https://www.infoplease.com/dictionary/pyrophyllite
No exact match found.