Goethite, locality unknown, a thin section from the optical mineralogy lab.
0.027mm, E|| c = beta
540.19, 3.0253
540.79, 2.9900
541.39, 2.9771
541.99, 2.9263
542.59, 2.8826
543.18, 2.8296
543.78, 2.7571
544.38, 2.7264
544.98, 2.6728
545.58, 2.6139
546.18, 2.5463
546.78, 2.4834
547.3, 2.4255
547.9, 2.3623
548.5, 2.2957
549.09, 2.2396
549.69, 2.1769
550.29, 2.1179
550.89, 2.0608
551.49, 2.0032
552.09, 1.9511
552.68, 1.8970
553.28, 1.8454
553.88, 1.7953
554.48, 1.7511
555.08, 1.7044
555.68, 1.6600
556.28, 1.6193
556.87, 1.5802
557.47, 1.5416
558.07, 1.5052
558.67, 1.4707
559.27, 1.4382
559.87, 1.4069
560.47, 1.3763
561.06, 1.3479
561.66, 1.3208
562.26, 1.2952
562.86, 1.2707
563.46, 1.2482
564.06, 1.2266
564.66, 1.2057
565.25, 1.1859
565.85, 1.1680
566.45, 1.1516
567.05, 1.1350
567.65, 1.1198
568.25, 1.1051
568.84, 1.0925
569.44, 1.0803
570.04, 1.0687
570.64, 1.0580
571.24, 1.0481
571.84, 1.0388
572.44, 1.0306
573.03, 1.0225
573.63, 1.0156
574.23, 1.0094
574.83, 1.0032
575.43, 0.9980
576.03, 0.9932
576.63, 0.9893
577.22, 0.9857
577.82, 0.9824
578.42, 0.9794
579.02, 0.9772
579.62, 0.9759
580.22, 0.9746
580.81, 0.9742
581.33, 0.9730
581.93, 0.9731
582.53, 0.9735
583.13, 0.9738
583.72, 0.9743
584.32, 0.9753
584.92, 0.9766
585.52, 0.9788
586.12, 0.9803
586.72, 0.9825
587.32, 0.9848
587.91, 0.9875
588.51, 0.9904
589.11, 0.9931
589.71, 0.9959
590.31, 0.9998
590.91, 1.0034
591.5, 1.0069
592.1, 1.0112
592.7, 1.0149
593.3, 1.0190
593.9, 1.0233
594.5, 1.0279
595.09, 1.0324
595.69, 1.0367
596.29, 1.0412
596.89, 1.0460
597.49, 1.0513
598.09, 1.0563
598.68, 1.0613
599.28, 1.0663
599.88, 1.0712
600.48, 1.0768
601.08, 1.0818
601.68, 1.0877
602.28, 1.0929
602.87, 1.0986
603.47, 1.1043
604.07, 1.1096
604.67, 1.1152
605.27, 1.1207
605.87, 1.1266
606.46, 1.1319
607.06, 1.1374
607.66, 1.1428
608.23, 1.1481
608.82, 1.1537
609.42, 1.1594
610.02, 1.1651
610.61, 1.1708
611.21, 1.1764
611.81, 1.1819
612.4, 1.1873
613., 1.1928
613.6, 1.1986
614.19, 1.2038
614.79, 1.2095
615.39, 1.2143
615.98, 1.2199
616.58, 1.2248
617.18, 1.2299
617.78, 1.2355
618.37, 1.2410
618.96, 1.2451
619.56, 1.2502
620.16, 1.2547
620.75, 1.2596
621.35, 1.2637
621.95, 1.2689
622.54, 1.2734
623.14, 1.2779
623.74, 1.2824
624.34, 1.2862
624.93, 1.2902
625.53, 1.2945
626.13, 1.2985
626.72, 1.3024
627.32, 1.3050
627.92, 1.3087
628.51, 1.3129
629.11, 1.3157
629.71, 1.3191
630.3, 1.3218
630.9, 1.3254
631.5, 1.3274
632.09, 1.3299
632.69, 1.3330
633.29, 1.3352
633.88, 1.3381
634.48, 1.3412
635.08, 1.3424
635.67, 1.3450
636.27, 1.3465
636.87, 1.3483
637.46, 1.3504
638.06, 1.3521
638.66, 1.3538
639.25, 1.3548
639.85, 1.3559
640.45, 1.3574
641.04, 1.3578
641.64, 1.3591
642.24, 1.3601
642.83, 1.3600
643.43, 1.3609
644.03, 1.3615
644.62, 1.3623
645.22, 1.3620
645.82, 1.3620
646.41, 1.3624
647.01, 1.3623
647.61, 1.3620
648.2, 1.3621
648.8, 1.3615
649.4, 1.3609
649.99, 1.3602
650.59, 1.3597
651.19, 1.3585
651.78, 1.3580
652.38, 1.3571
652.98, 1.3555
653.57, 1.3544
654.17, 1.3528
654.77, 1.3518
655.36, 1.3502
655.96, 1.3489
656.56, 1.3467
657.15, 1.3446
657.75, 1.3427
658.35, 1.3407
658.94, 1.3391
659.54, 1.3367
660.14, 1.3347
660.73, 1.3321
661.33, 1.3302
661.93, 1.3271
662.52, 1.3238
663.12, 1.3217
663.72, 1.3188
664.31, 1.3160
664.9, 1.3131
665.5, 1.3101
666.09, 1.3065
666.69, 1.3032
667.29, 1.3004
667.88, 1.2969
668.48, 1.2943
669.08, 1.2903
669.67, 1.2865
670.27, 1.2832
670.86, 1.2793
671.46, 1.2762
672.06, 1.2720
672.65, 1.2685
673.25, 1.2649
673.85, 1.2606
674.44, 1.2567
675.04, 1.2527
675.64, 1.2485
676.23, 1.2440
676.83, 1.2403
677.43, 1.2361
678.02, 1.2320
678.62, 1.2282
679.22, 1.2233
679.81, 1.2186
680.41, 1.2141
681.01, 1.2092
681.6, 1.2048
682.2, 1.2008
682.8, 1.1961
683.39, 1.1913
683.99, 1.1868
684.59, 1.1823
685.18, 1.1772
685.78, 1.1724
686.38, 1.1680
686.97, 1.1628
687.57, 1.1578
688.17, 1.1535
688.76, 1.1482
689.36, 1.1430
689.96, 1.1380
690.55, 1.1329
691.15, 1.1280
691.75, 1.1230
692.34, 1.1181
692.94, 1.1128
693.54, 1.1079
694.13, 1.1027
694.73, 1.0973
695.33, 1.0925
695.92, 1.0871
696.52, 1.0822
697.12, 1.0771
697.71, 1.0718
698.31, 1.0668
698.91, 1.0617
699.5, 1.0564
700.1, 1.0512
700.69, 1.0457
701.29, 1.0403
701.89, 1.0355
702.48, 1.0304
703.08, 1.0247
703.68, 1.0191
704.27, 1.0143
704.87, 1.0094
705.47, 1.0047
706.06, 0.9992
706.66, 0.9935
707.26, 0.9882
707.85, 0.9831
708.45, 0.9780
709.05, 0.9730
709.64, 0.9682
710.24, 0.9632
710.84, 0.9578
711.41, 0.9528
712.01, 0.9481
712.61, 0.9435
713.2, 0.9385
713.8, 0.9336
714.4, 0.9287
714.99, 0.9239
715.59, 0.9189
716.19, 0.9138
716.78, 0.9094
717.38, 0.9047
717.98, 0.9001
718.57, 0.8957
719.17, 0.8909
719.77, 0.8863
720.36, 0.8816
720.96, 0.8773
721.55, 0.8726
722.15, 0.8681
722.75, 0.8639
723.34, 0.8595
723.94, 0.8553
724.54, 0.8516
725.13, 0.8471
725.73, 0.8433
726.33, 0.8389
726.92, 0.8354
727.52, 0.8319
728.12, 0.8280
728.71, 0.8243
729.31, 0.8205
729.91, 0.8169
730.5, 0.8134
731.1, 0.8101
731.7, 0.8061
732.29, 0.8028
732.89, 0.7996
733.48, 0.7965
734.08, 0.7932
734.68, 0.7899
735.27, 0.7866
735.87, 0.7840
736.47, 0.7812
737.06, 0.7781
737.66, 0.7749
738.26, 0.7721
738.85, 0.7698
739.45, 0.7672
740.05, 0.7645
740.64, 0.7615
741.24, 0.7591
741.84, 0.7565
742.43, 0.7543
743.03, 0.7518
743.63, 0.7494
744.22, 0.7471
744.82, 0.7449
745.41, 0.7429
746.01, 0.7411
746.61, 0.7393
747.2, 0.7373
747.8, 0.7352
748.4, 0.7333
748.99, 0.7317
749.59, 0.7301
750.19, 0.7282
750.78, 0.7269
751.38, 0.7252
751.98, 0.7237
752.57, 0.7221
753.17, 0.7214
753.77, 0.7200
754.36, 0.7186
754.96, 0.7174
755.55, 0.7164
756.15, 0.7152
756.75, 0.7139
757.34, 0.7133
757.94, 0.7125
758.51, 0.7114
759.11, 0.7106
759.7, 0.7101
760.3, 0.7098
760.9, 0.7094
761.49, 0.7090
762.09, 0.7082
762.68, 0.7079
763.28, 0.7075
763.88, 0.7070
764.47, 0.7072
765.07, 0.7070
765.67, 0.7066
766.26, 0.7064
766.86, 0.7065
767.46, 0.7072
768.05, 0.7071
768.65, 0.7068
769.25, 0.7070
769.84, 0.7075
770.44, 0.7075
771.03, 0.7081
771.63, 0.7085
772.23, 0.7092
772.82, 0.7098
773.42, 0.7106
774.02, 0.7109
774.61, 0.7115
775.21, 0.7124
775.81, 0.7134
776.4, 0.7144
777., 0.7152
777.59, 0.7157
778.19, 0.7165
778.79, 0.7171
779.38, 0.7182
779.98, 0.7189
780.58, 0.7205
781.17, 0.7222
781.77, 0.7230
782.37, 0.7240
782.96, 0.7251
783.56, 0.7260
784.16, 0.7277
784.75, 0.7290
785.35, 0.7305
785.94, 0.7318
786.54, 0.7332
787.14, 0.7347
787.73, 0.7359
788.33, 0.7376
788.93, 0.7389
789.52, 0.7406
790.12, 0.7427
790.72, 0.7440
791.31, 0.7455
791.91, 0.7470
792.5, 0.7494
793.1, 0.7512
793.7, 0.7529
794.29, 0.7542
794.89, 0.7559
795.49, 0.7577
796.08, 0.7597
796.68, 0.7619
797.28, 0.7633
797.87, 0.7655
798.47, 0.7678
799.07, 0.7700
799.66, 0.7723
800.26, 0.7737
800.85, 0.7755
801.45, 0.7775
802.05, 0.7800
802.64, 0.7820
803.24, 0.7840
803.84, 0.7864
804.43, 0.7881
804.99, 0.7908
805.59, 0.7932
806.19, 0.7953
806.78, 0.7975
807.38, 0.7994
807.98, 0.8012
808.57, 0.8037
809.17, 0.8060
809.76, 0.8080
810.36, 0.8103
810.96, 0.8124
811.55, 0.8149
812.15, 0.8174
812.75, 0.8196
813.34, 0.8217
813.94, 0.8238
814.53, 0.8264
815.13, 0.8290
815.73, 0.8308
816.32, 0.8336
816.92, 0.8357
817.52, 0.8375
818.11, 0.8401
818.71, 0.8432
819.31, 0.8452
819.9, 0.8473
820.5, 0.8498
821.09, 0.8526
821.69, 0.8550
822.29, 0.8566
822.88, 0.8591
823.48, 0.8622
824.08, 0.8648
824.67, 0.8666
825.27, 0.8693
825.86, 0.8717
826.46, 0.8733
827.06, 0.8757
827.65, 0.8782
828.25, 0.8811
828.85, 0.8841
829.44, 0.8863
830.04, 0.8881
830.63, 0.8908
831.23, 0.8931
831.83, 0.8955
832.42, 0.8977
833.02, 0.9004
833.62, 0.9025
834.21, 0.9055
834.81, 0.9074
835.41, 0.9100
836., 0.9128
836.6, 0.9154
837.19, 0.9173
837.79, 0.9196
838.39, 0.9220
838.98, 0.9244
839.58, 0.9265
840.18, 0.9286
840.77, 0.9303
841.37, 0.9327
841.96, 0.9354
842.56, 0.9383
843.16, 0.9407
843.75, 0.9428
844.35, 0.9443
844.95, 0.9463
845.54, 0.9485
846.14, 0.9509
846.73, 0.9530
847.33, 0.9548
847.93, 0.9575
848.52, 0.9606
849.12, 0.9615
849.72, 0.9634
850.31, 0.9661
850.91, 0.9683
851.46, 0.9705
852.06, 0.9721
852.65, 0.9745
853.25, 0.9760
853.85, 0.9782
854.44, 0.9802
855.04, 0.9819
855.64, 0.9839
856.23, 0.9861
856.83, 0.9878
857.42, 0.9893
858.02, 0.9911
858.62, 0.9932
859.21, 0.9953
859.81, 0.9972
860.41, 0.9992
861., 1.0008
861.6, 1.0027
862.19, 1.0046
862.79, 1.0060
863.39, 1.0075
863.98, 1.0090
864.58, 1.0110
865.17, 1.0129
865.77, 1.0151
866.37, 1.0159
866.96, 1.0176
867.56, 1.0188
868.16, 1.0208
868.75, 1.0218
869.35, 1.0238
869.94, 1.0253
870.54, 1.0260
871.14, 1.0282
871.73, 1.0288
872.33, 1.0304
872.93, 1.0322
873.52, 1.0334
874.12, 1.0345
874.71, 1.0359
875.31, 1.0371
875.91, 1.0384
876.5, 1.0397
877.1, 1.0403
877.7, 1.0420
878.29, 1.0439
878.89, 1.0448
879.48, 1.0456
880.08, 1.0465
880.68, 1.0477
881.27, 1.0491
881.87, 1.0501
882.46, 1.0508
883.06, 1.0524
883.66, 1.0536
884.25, 1.0543
884.85, 1.0556
885.45, 1.0567
886.04, 1.0576
886.64, 1.0588
887.23, 1.0601
887.83, 1.0607
888.43, 1.0614
889.02, 1.0620
889.62, 1.0624
890.22, 1.0638
890.81, 1.0644
891.41, 1.0655
892., 1.0672
892.6, 1.0676
893.2, 1.0681
893.79, 1.0683
894.39, 1.0693
894.98, 1.0700
895.58, 1.0705
896.18, 1.0716
896.77, 1.0722
897.37, 1.0728
897.97, 1.0727
898.51, 1.0738
899.11, 1.0747
899.7, 1.0752
900.3, 1.0755
900.9, 1.0764
901.49, 1.0772
902.09, 1.0774
902.68, 1.0780
903.28, 1.0786
903.88, 1.0789
904.47, 1.0798
905.07, 1.0801
905.66, 1.0800
906.26, 1.0808
906.86, 1.0812
907.45, 1.0816
908.05, 1.0816
908.64, 1.0820
909.24, 1.0825
909.84, 1.0828
910.43, 1.0828
911.03, 1.0825
911.63, 1.0831
912.22, 1.0840
912.82, 1.0845
913.41, 1.0849
914.01, 1.0842
914.61, 1.0846
915.2, 1.0853
915.8, 1.0851
916.39, 1.0852
916.99, 1.0861
917.59, 1.0853
918.18, 1.0861
918.78, 1.0863
919.37, 1.0856
919.97, 1.0867
920.57, 1.0868
921.16, 1.0859
921.76, 1.0860
922.35, 1.0864
922.95, 1.0864
923.55, 1.0864
924.14, 1.0866
924.74, 1.0866
925.34, 1.0867
925.93, 1.0875
926.53, 1.0877
927.12, 1.0869
927.72, 1.0862
928.32, 1.0867
928.91, 1.0860
929.51, 1.0861
930.1, 1.0869
930.7, 1.0861
931.3, 1.0858
931.89, 1.0853
932.49, 1.0852
933.08, 1.0842
933.68, 1.0843
934.28, 1.0849
934.87, 1.0846
935.47, 1.0846
936.07, 1.0840
936.66, 1.0841
937.26, 1.0840
937.85, 1.0837
938.45, 1.0836
939.05, 1.0828
939.64, 1.0837
940.24, 1.0827
940.83, 1.0825
941.43, 1.0820
942.03, 1.0821
942.62, 1.0818
943.22, 1.0815
943.81, 1.0807
944.41, 1.0800
944.95, 1.0790
945.54, 1.0794
946.14, 1.0795
946.74, 1.0788
947.33, 1.0785
947.93, 1.0784
948.52, 1.0777
949.12, 1.0770
949.72, 1.0764
950.31, 1.0759
950.91, 1.0752
951.5, 1.0742
952.1, 1.0741
952.7, 1.0733
953.29, 1.0733
953.89, 1.0730
954.48, 1.0717
955.08, 1.0707
955.68, 1.0706
956.27, 1.0695
956.87, 1.0690
957.46, 1.0682
958.06, 1.0679
958.66, 1.0678
959.25, 1.0671
959.85, 1.0661
960.44, 1.0649
961.04, 1.0646
961.64, 1.0650
962.23, 1.0634
962.83, 1.0621
963.42, 1.0615
964.02, 1.0598
964.62, 1.0592
965.21, 1.0594
965.81, 1.0586
966.4, 1.0579
967., 1.0563
967.6, 1.0552
968.19, 1.0558
968.79, 1.0540
969.38, 1.0528
969.98, 1.0517
970.58, 1.0506
971.17, 1.0493
971.77, 1.0482
972.36, 1.0471
972.96, 1.0467
973.56, 1.0454
974.15, 1.0454
974.75, 1.0447
975.34, 1.0431
975.94, 1.0424
976.54, 1.0410
977.13, 1.0398
977.73, 1.0396
978.32, 1.0383
978.92, 1.0366
979.52, 1.0350
980.11, 1.0330
980.71, 1.0320
981.3, 1.0307
981.9, 1.0309
982.5, 1.0295
983.09, 1.0277
983.69, 1.0270
984.28, 1.0245
984.88, 1.0237
985.48, 1.0219
986.07, 1.0214
986.67, 1.0208
987.26, 1.0196
987.86, 1.0184
988.46, 1.0157
989.05, 1.0146
989.65, 1.0142
990.24, 1.0117
990.84, 1.0100
991.37, 1.0099
991.97, 1.0086
992.56, 1.0061
993.16, 1.0054
993.75, 1.0035
994.35, 1.0016
994.94, 1.0005
995.54, 0.9994
996.14, 0.9971
996.73, 0.9951
997.33, 0.9931
997.92, 0.9926
998.52, 0.9923
999.12, 0.9910
999.71, 0.9891
1000.31, 0.9863
1000.9, 0.9854
1001.5, 0.9835
1002.1, 0.9818
1002.69, 0.9805
1003.29, 0.9788
1003.88, 0.9781
1004.48, 0.9759
1005.08, 0.9743
1005.67, 0.9724
1006.27, 0.9704
1006.86, 0.9694
1007.46, 0.9667
1008.05, 0.9647
1008.65, 0.9631
1009.25, 0.9608
1009.84, 0.9595
1010.44, 0.9587
1011.03, 0.9561
1011.63, 0.9567
1012.23, 0.9525
1012.82, 0.9510
1013.42, 0.9493
1014.01, 0.9467
1014.61, 0.9457
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