Meaning | A dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals. |
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Broader | mineral | Solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
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Substances | erbium, Er, atomic number 68 | A trivalent metallic element of the rare earth group |
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tantalum, Ta, atomic number 73 | A hard grey lustrous metallic element that is highly resistant to corrosion |
yttrium, Y, atomic number 39 | A silvery metallic element that is common in rare-earth minerals |
Spanish | fergusonita |
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Catalan | fergusonita |
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