Mineral Information and Data:

Hyalotekite
(Ba,Pb,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28F [CNMNC approved formula]

Named from the Greek "hyalos" and "tektos" owing to its property of forming a clear, colorless glass upon heating.

IMA status : Valid species (Pre-IMA 1877) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
78.06.01.01  
  (78) Unclassified silicates
  (78.06) possible tectosilicates
  (78.06.01)
  
Nickel-Strunz
(10th edition) :
09.CH.05
  (09) Silicates
  (09.C) Cyclosilicates
  (09.CH) [Si4O12]8- 4-membered double rings
  
Crystal system: Triclinic System
Point group (H-M): 1 — pinacoidal
  
  
  

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