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“Rare” is being used in the same sense as “rare earth elements,” not in the typical, common usage of rare. The “rare” part comes from: 1. They rarely form conc
by whatio 2y ago
“Rare” is being used in the same sense as “rare earth elements,” not in the typical, common usage of rare. The “rare” part comes from:
1. They rarely form concentrated ore deposits, instead being widely dispersed throughout rock formations
2. The elements are very chemically similar to each other, making them difficult and expensive to separate and purify for industrial use
- _2d30 2y ago[flagged]
- MiguelX413 2y agoOr the headline
- dang 2y agoPlease make your substantive points without breaking the site guidelines. Your comment would be fine with just the second sentence. https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
- deleted 2y ago[deleted]