Mineral Information and Data:

Boltwoodite  
KUO2(SiO3OH) • H2O [CNMNC approved formula]

Named for Bertram Borden Boltwood (1870-1927), radiochemist of Yale University, New Haven, Connecticut, USA, who devised the U-Pb method of measuring geologic time.

IMA status : Valid species (Pre-IMA 1956) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
53.03.01.05  
  (53) Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
  (53.03) with (UO2)
  (53.03.01) Uranophane group
  
Nickel-Strunz
(10th edition) :
09.AK.15
  (09) Silicates
  (09.A) Nesosilicates (Isolated tetrahedron) structures
  (09.AK) Uranyl neso- and polysilicates
  
Crystal system: Monoclinic System
Point group (H-M): 2 — sphenoidal
  
  
  
Other Properties: Radioactive.
Comments: Radioactive.

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