Mineral Information and Data:

Tornebohmite-(La)
La2Al(SiO4)2(OH) [CNMNC approved formula]

Named for Alfred Ellis Tornebohm (1839-1911), former director of the Geological Survey of Sweden.

IMA status : Approved Species 1921 ()
CLASSIFICATION 
Dana
(8th edition) :
52.04.05.02  
  (52) Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04) with cations in [6] and/or > [6] coordination
  (52.04.05) Tornebohmite group
  
Nickel-Strunz
(10th edition) :
09.AG.45
  (09) Silicates
  (09.A) Nesosilicates (Isolated tetrahedron) structures
  (09.AG) Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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