Scandium is metal, but not a mineral.
Previously, the list of "critical minerals" from USGS looked like this. More
Scandium was a part of Rare earth elements.
The list of "critical minerals" in 2018 looks like this. More
Why did USGS make scandium in the list "critical minerals" twice?
For what purpose did the USGS make scandium among the "critical minerals" twice?1, They do not know that scandium is not a mineral?
2. They do not know that scandium belongs to the group of rare earth elements?
3. Did they write it off from others?
4. Other purpose?
Ph.D. Natalia Petrovskaya
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Previously, the list of "critical minerals" from USGS looked like this. More
Scandium was a part of Rare earth elements.
Why did USGS make scandium in the list "critical minerals" twice?
For what purpose did the USGS make scandium among the "critical minerals" twice?1, They do not know that scandium is not a mineral?
2. They do not know that scandium belongs to the group of rare earth elements?
3. Did they write it off from others?
4. Other purpose?
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