Formula: CaCu(OH)VO4
Reflected/transmitted colour: Pale green
Pleochroism: Brown (X=Y), green (Z)
Optical isotropy/anisotropy: Biaxail
Optical sign: -
Refractive indices: α = 2.01, β = 2.05, γ = 2.09
Bireflectance/Birefringence δ: 0.08
2V angle: 88° (calculated), 83° (measured)
Dispersion: Strong, r > v
Optical orientation: X = a, Y = b
Optical axial plane:
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