Formula: CaFe2(AsO4)2(OH)2
Reflected/transmitted colour: Light bluish gray with bright pink to red internal reflections (RL)
Pleochroism: None
Optical isotropy/anisotropy: Weak anisotropic
Optical sign:
Refractive indices:
Bireflectance/Birefringence δ: Weak
2V angle:
Dispersion:
Optical orientation:
Optical axial plane:
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