Mineral Information and Data:

Guimaraesite
Ca2Zn5Be4(PO4)6(OH)4 • 6H2O [CNMNC approved formula]

Named Commission on New Minerals, Nomenclature and Classification (CNMNC).

IMA status : Approved Species 2006 ()
CLASSIFICATION 
Dana
(8th edition) :
42.07.07.06  
  (42) Hydrated Phosphates Containing Hydroxyl or Halogen
  (42.07) where (AB)5 (XO4)3 Zq · x(H2O)
  (42.07.07) Roscherite group
  
Nickel-Strunz
(10th edition) :
08.DA.10
  (08) Phosphates, Arsenates, Vanadates
  (08.D) Phosphates, etc
  (08.DA) With small (and occasionally larger) cations
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
  
  
  

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