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Definition of Johnwalkite
1. Noun. (minerology) An orthorhombic-pyramidal mineral containing hydrogen, iron, magnesium, manganese, niobium, oxygen, phosphorus, potassium, and tantalum. ¹
¹ Source: wiktionary.com
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1. Noun. (minerology) An orthorhombic-pyramidal mineral containing hydrogen, iron, magnesium, manganese, niobium, oxygen, phosphorus, potassium, and tantalum. ¹
¹ Source: wiktionary.com