[ Top ] [ Japanese ]

Parasymplesite (Photo)

Year of discovery: 1954 (Japan as the first occurence in the World)

Locality list: 6 localities of parasymplesite

• Fe₃(AsO₄)₂,8H₂O
• [Fe²⁺₃][(AsO₄)₂]^3-,8H₂O

• Class: Vivianite group
• Class: Arsenate - Hydrate
• Oxidized to Ferrisymplesite by light exposure.

• Polymorph: Symplesite (Triclinic)

• Fe => Ni: Annabergite
• Fe => Zn: Köttigite (Kottigite) (Series), Metaköttigite (Metakottigite)
• Fe => Co: Erythrite
• Fe => Mg: Hörnesite (Hornesite)
• Fe => Mn: Manganohörnesite, Manganohornesite

• Fe²⁺H => Fe³⁺O: Ferrisymplesite

• AsO₄ => PO₄: Vivianite

• Color: Pale green
• Tarnish: Dark green (by photo-oxidation)
• Streak: Pale blue
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Habit: Acicular, Prismatic
• Aggregate: Radial

• Cleavage: Perfect on {110} (2 plane)
• Hardness: 2
• Density: 3.0

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=10.3, b=13.5, c=4.8, β=104.9