Apophyllite Visible-NIR Spectra (300 - 2000 nm)
The apophyllite absorption spectrum
Aphphyllite, KCa
4
[Si
8
O
22
]F·8H
2
O, would be colorless if it had its ideal formula.
GRR 140 spectrum;
This crystal is pale green and is typical for the
vanadium-containing crystals
from many quarries in India. This one comes from Poona (now Pune), India. The color comes from the VO
2
2+
cation. The thickness is 2.40 mm. Data Files:
E perpendicular to c
;
E \\c
.
Link to references
to visible spectroscopy of apophyllite.
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revised 3-Jul-2022