Patrónite
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Patrónite is the vanadium sulfide mineral with formula VS₄. The material is usually described as V⁴⁺(S₂²⁻)₂. Structurally, it is a "linear-chain" compound with alternating bonding and nonbonding contacts between the vanadium centers. The vanadium... Wikipedia
Color: Lead-gray on fresh surfaces to gray-black after exposure to air
Crystal class: Prismatic (2/m); (same H-M symbol)
Crystal habit: Occurs as columnar crystal aggregates and in massive form
Crystal system: Monoclinic
Formula mass: 179.21 g/mol
Formula (repeating unit): VS4
IMA symbol: Pat
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