Arrojadite is a phosphate mineral found in pegmatites. Is is
KNa4CaMn4Fe2+10Al(PO4)12(OH,F)2.
Image of the arrojadite absorption spectrum
GRR 32 spectrum; from the
Smith Mine, Newport, New Hampshire, USA Plotted as 0.200 mm
thick. The yellowish-green color of this material comes from Fe2+
and varies considerably with the direction in which it is observed. Data
Files: E|| alpha = b 2K;E||
beta ~ c 3K; E|| gamma 2K.
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