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Uranophane crystals from Brazil - Uranophane is a rare calcium uranium silicate hydrate mineral that forms from the oxidation of uranium bearing minerals. Uranophane is also known as uranotile. It has a yellow color and is radioactive.

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Castelo Zé dos Montes, Sítio Novo - Serra do Tapuia - Rio Grande do Norte / Brasil...

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eBook Travel Guides and PDF Chapters from Lonely Planet: Brazil travel guide - 10th edition (PDF Chapter) L...

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