Formula: Pb2Cu(CrO4)(PO4)(OH)
Reflected/transmitted colour:
Pleochroism: Pale green (x), pale brown (y), pale brown (z)
Optical isotropy/anisotropy: Biaxial
Optical sign: -
Refractive indices: α = 2.11, β = 2.22, γ = 2.22
Bireflectance/Birefringence δ: 0.11
2V angle: about 0° (measured)
Dispersion:
Optical orientation:
Optical axial plane:
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