Mineral Information and Data:

Aluminocerite-(Ce)
(Ce,Ca)9Al(SiO4)3(SiO3OH)4(OH)3 [CNMNC approved formula]

Named as the Al-dominant analog of cerite-(Ce).

IMA status : Approved Species 2007 (IMA2007-060)
CLASSIFICATION 
Dana
(8th edition) :
52.04.06.03  
  (52) Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04) with cations in [6] and/or > [6] coordination
  (52.04.06) Cerite Group
  
Nickel-Strunz
(10th edition) :
09.AG.20
  (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: Trigonal System
Point group (H-M): 3m — ditrigonal-pyramidal
Unit cell: a = 10.645Å, c = 38.019Å
  
Color: Pale pink, Reddish pink
Diaphaneity: Translucent
Luster: Vitreous
Hardness (Mohs): 5
Measured Density: 4.675 g/cm3
Tenacity: Brittle
Streak: White
  
Geologic Setting: Found in millimeter-sized secondary cavities hosted in aplite-pegmatite veins and pods within pink granite.
  

 

Aluminocerite-(Ce)
BSE image of the holotype of aluminocerite-(Ce) showing pseudo-octahedral to rombohedral crystals flattened on the c axis. (AmMin v94:488).
Origin: Ratti quarry near Baveno, Italy.
Copyright: © American Mineralogist

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