Wat het is
A solid-solution series: niobium-rich at one end, tantalum-rich at the other. Source of both metals, and a designated conflict mineral.
Ertsmineraal
Columbite-Tantalite (coltan)
A solid-solution series: niobium-rich at one end, tantalum-rich at the other. Source of both metals, and a designated conflict mineral.
Large potassium feldspar & quartz & mica crystals in pegmat… ·
James St. John ·
CC BY 2.0
· Wikimedia Commons
