Mineral Information and Data:

Pinakiolite
(Mg,Mn2+)2(Mn3+,Sb5+)O2(BO3) [CNMNC approved formula]

Named from the Greek for "small tablet", in allusion to the morphology.

IMA status : Valid species (Pre-IMA 1890) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
24.02.04.01  
  (24) Borates - Anhydrous
  (24.02) where (A)2 BO2 [XO3]
  (24.02.04)
  
Nickel-Strunz
(10th edition) :
06.AB.35
  (06) Borates
  (06.A) Monoborates
  (06.AB) BO3, without additional anions; 1(D) + OH, etc.
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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