pyrrhotite

American  

[pir-uh-tahyt] / ˈpɪr əˌtaɪt /

noun

1. a common mineral, iron sulfide, approximately FeS but variable because of a partial absence of ferrous ions, occurring in massive and in crystal forms with a bronze color and metallic luster; magnetic pyrites: generally slightly magnetic.

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pyrrhotite British  

/ ˈpɪrəˌtiːn, ˈpɪrəˌtaɪt, -tɪn, -ˌtaɪn /

noun

1. a common bronze-coloured magnetic mineral consisting of ferrous sulphide in hexagonal crystalline form. Formula: FeS

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Etymology

Origin of pyrrhotite

1868; < Greek pyrrhót ( ēs ) redness + -ite ¹

Example Sentences

Around 2,000 homes in the state that were built with an iron sulfide known as pyrrhotite will need their foundation replaced, MassLive.com reported Wednesday.

From Washington Times

“We need a better understanding of the scope of the crisis and of the mineral pyrrhotite.”

From Washington Times

Often described as a “slow-moving disaster,” the problem is caused by an iron sulfide known as pyrrhotite, which causes concrete to crack and break gradually as it becomes exposed to water and oxygen.

From Washington Times

In her book “Lorna Simpson Collages,” from last year, she embellishes vintage photos of models, giving them hairdos made of nightshade-colored plumes and nuggets of pyrrhotite, linking the stylized to the fecund and the surreal.

From The New Yorker

Friday’s bills would improve quarry standards, require sellers to disclose issues with pyrrhotite, and require homeowners insurance policies cover the peril of collapse, something the industry opposes, saying it will increase insurance costs.

From Washington Times