Formula :
(K,Na)2[(UO2)2/Si5O13] * 3 H2O
System: orthorhombic Hardness:1-2 Rarity:not common
Strunz id:VIII/H.37-10 -
SILICATES
Name origin: Named in 1960 by W. F. Osterbridge, Mortimer Hay Staatz, Robert Meyrowitz, and A. M. Plummer in honor of Alice Mary Dowse Weeks [August, 26, 1909 Sherborn, Massachusetts, USA - August 29, 1988 Bryn Mawr, Pennsylvania, USA], mineralogist for the United States Geological Survey and later professor of mineralogy, Temple University (Philadelphia, USA).
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