Mineral Information and Data:

Vlasovite
Na2ZrSi4O11 [CNMNC approved formula]

Named for Kuz'ma Alekseevich Vlasov (1905-1964), founder of the Institute of Mineralogy, Geochemistry, and Crystal Chemistry of Rare Elements, Moscow, Russia.

IMA status : Approved Species 1961 ()
CLASSIFICATION 
Dana
(8th edition) :
66.02.02.01  
  (66) Inosilicate Double-Width Unbranched Chains, W=2
  (66.02) with P=2 non-amphibole configuration
  (66.02.02)
  
Nickel-Strunz
(10th edition) :
09.DM.25
  (09) Silicates
  (09.D) Inosilicates* Structural terminology per Liebau (1985)
  (09.DM) with 6-periodic single chains
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  
Other Properties: Gemstone Extremely Rare.

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