Studies of uranium minerals (XIV): renardite

Clifford Frondel; Frank Cuttitta

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Research Article| June 01, 1954

Studies of uranium minerals (XIV): renardite^*^†

Clifford Frondel;

Clifford Frondel

Harvard University, Cambridge, Mass. and U. S. Geological Survey, Washington 25, D. C.

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Frank Cuttitta

Harvard University, Cambridge, Mass. and U. S. Geological Survey, Washington 25, D. C.

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Author and Article Information

Clifford Frondel

Harvard University, Cambridge, Mass. and U. S. Geological Survey, Washington 25, D. C.

Frank Cuttitta

Harvard University, Cambridge, Mass. and U. S. Geological Survey, Washington 25, D. C.

Publisher: Mineralogical Society of America

First Online: 06 Jul 2018

Online ISSN: 1945-3027

Print ISSN: 0003-004X

Mineralogical Society of America

American Mineralogist (1954) 39 (5-6): 448–451.

Abstract

A new chemical analysis of renardite from Katanga has confirmed the formula Pb(UO₂)₄(PO₄)₂(OH)₄ · 7H₂O. X-ray single-crystal study established the unit cell as orthorhombic, with the dimensions a 16.01 Å, b 17.5, c 13.7. Renardite is isostructural with both dewindtite (a 16.07 Å, b 17.50, c 13.62) and phosphuranylite. The chemical composition of dwindtite, however, cannot be reconciled with that of renardite on this basis. Phosphuranylite probably is the calcium analogue of renardite, with the formula Ca(UO₂)₄(PO₄)₂(OH)₄ · 7H₂O.