Mineral Information and Data:

Bario-orthojoaquinite
Ba4Fe2+2Ti2O2(SiO3)8 • H2O [CNMNC approved formula]

Named after its composition, orthorhombic crystal structure, and the relationship to joaquinite (named for Joaquin Ridge, Diablo Range, California, USA).

IMA status : Approved Species 1980 (IMA1979-081)
CLASSIFICATION 
Dana
(8th edition) :
60.01.01b.03  
  (60) Cyclosilicate Four-Membered Rings
  (60.01) as Titanosilicates
  (60.01.01b) Joaquinite group (Ortho-joaquinite subgroup)
  
Nickel-Strunz
(10th edition) :
09.CE.25
  (09) Silicates
  (09.C) Cyclosilicates
  (09.CE) [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
  
Crystal system: Orthorhombic System
Point group (H-M): mmm (or 2/m 2/m 2/m) — dipyramidal
Space group: Ccmm
Unit cell: a = 10.47Å, b = 9.59Å, c = 22.59Å
Crystal Habit: As pseudotetragonal crystals, steep dipyramidal {111} and truncated by {001}, to 8 mm; pyramidal faces are curved and striated; as aggregates.
  
Color: Yellow-brown
Diaphaneity: Transparent to translucent
Luster: Vitreous
Hardness (Mohs): 5.5
Measured Density: 3.96 g/cm3
Cleavage: {001}, good
Streak: Pale yellow
  
Geologic Setting: In a block of highly fractured basalt subjected to high-pressure metamorphism and serpentinization.
Mineral Association: Benitoite, baotite, fresnoite, natrolite
  

<<< BACK TO MINERAL SEARCH