Formula: CaVOSiO4
Reflected/transmitted colour:
Pleochroism: brownish red-orange (x), brownish red-orange (y), deep greenish blue (z)
Optical isotropy/anisotropy: Biaxial
Optical sign: +
Refractive indices: α = 1.95, γ = 2.105
Bireflectance/Birefringence δ: 0.155
2V angle: 17-40° (measured)
Dispersion:
Optical orientation:
Optical axial plane:
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