samarskite
noun
sa·mar·skite
sə-ˈmär-ˌskīt 
ˈsa-mər-
: a black or brownish-black orthorhombic mineral that is a complex oxide of rare earths, uranium, iron, lead, thorium, niobium, tantalum, titanium, and tin
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“Samarskite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/samarskite. Accessed 22 Dec. 2024.
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