What does siderite mean?
Siderite is the name of an iron carbonate mineral whose chemical formula is FeCO₃. It commonly occurs in sedimentary rocks and can be associated with other iron minerals, making it of interest in geology, mining, and the study of iron ores. The word also has a historical astronomical and meteoritic sense: a siderite is an iron meteorite, traditionally understood as a mass of metallic iron and nickel. These two meanings share the idea of iron and the word’s origin in the Greek term for iron. In everyday use, siderite usually refers to the mineral, while the meteorite sense is specialized and more often encountered in older or formal writing. A specimen may be described as sideritic when it is rich in siderite or has the characteristic properties of the mineral.
An iron carbonate mineral with the formula FeCO₃, typically formed in sedimentary environments.
"Siderite was found interbedded with shale in the quarry."
This is the principal modern mineralogical sense.
Historically, an iron meteorite consisting chiefly of iron and nickel.
"The collection includes a siderite from a nineteenth-century expedition."
This sense is specialized and mainly historical; modern classifications commonly use the term “iron meteorite.”
The plural is used when referring to multiple siderite minerals or specimens.
"Rare siderites have been recovered from several carbonaceous chondrite meteorites."
Siderite links the solid ground beneath our feet with meteorites from space: it is both an iron-rich mineral and the name of a kind of iron meteorite.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does siderite come from?
The word siderite comes from Greek sidēros, meaning “iron,” combined with the mineral-forming suffix -ite. The name reflects the mineral’s high iron content. Its application to certain iron meteorites follows from their similarly iron-rich composition and belongs to the historical terminology of meteoritics.
Related word forms
How siderite is actually used
In mineralogy, the term usually refers to the iron carbonate mineral. In meteoritics, it denotes an iron meteorite; the sense is historical and is distinguished from the closely related term “iron meteorite” in modern classification.