Also found in: Thesaurus, Encyclopedia.


 (pĭr′ə-tīt′) also pyr·rho·tine (-tīn′)
A brownish-bronze iron sulfide mineral, FeS, characterized by weak magnetic properties and used as an iron ore and in the manufacture of sulfuric acid. Also called magnetic pyrites.

[Alteration (influenced by -ite) of German Pyrrhotin, from Greek purrotēs, redness, from purros, fiery, from pūr, fire; see paəwr̥ in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pyrrhotine - a brownish iron sulfide mineral (FeS) having weak magnetic propertiespyrrhotine - a brownish iron sulfide mineral (FeS) having weak magnetic properties
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The hydrothermal mineralization is the main metallogenic period and is divided into 4 metallogenic stages from early to late: stage I is K-feldspar-quartz-magnetite (a mineral association of K-feldspar, quartz, magnetite, pyrrhotine, and pyrite), stage II is quartz-molybdenite (a mineral association of quartz, K-feldspar, molybdenite, chalcopyrite, and pyrite), stage III is quartz-chalcopyrite (polymetallic sulfide) (a mineral association of quartz, sericite, chalcopyrite, pyrite, galena, and sphalerite), and stage IV is carbonate (a mineral association of carbonate, fluorite, chlorite, epidote, pyrite, galena, and sphalerite).
Other minerals: According to EDS analyses apatite, pyrrhotine, and pyrite are virtually pure phases.
The source of the weak magnetic high is an occurrence of the magnetic graphitic phyllites with pyrrhotine.