Above is an encomium in brass letters, most of which have long since fallen off the wall leaving only silhouettes.
en.wikipedia.org The region also has one of the largest niobium reserves in the world.
en.wikipedia.org For this reason, niobium is found in many medical devices such as pacemakers.
en.wikipedia.org Potash, uranium, niobium, iron ore, lead, zinc, diamonds, marble, and phosphate have also been discovered, and several deposits were being exploited commercially.
en.wikipedia.org He also carried out researches on niobium, tungsten, uranium, perchloric acid, and the solubility of ammonia.
en.wikipedia.org