Usambara tourmaline.
Recalculated to thickness 1 cm, E perp c
5555.55556, 0.18067
5571.03064, 0.18333
5586.59218, 0.21267
5602.2409, 0.22567
5617.97753, 0.26067
5633.80282, 0.27567
5649.71751, 0.282
5665.72238, 0.27767
5681.81818, 0.266
5698.0057, 0.232
5714.28571, 0.19533
5730.65903, 0.18067
5747.12644, 0.18067
5763.68876, 0.18067
5780.34682, 0.18067
5797.10145, 0.18067
5813.95349, 0.18833
5830.90379, 0.209
5847.95322, 0.233
5865.10264, 0.26267
5882.35294, 0.27067
5899.70501, 0.28367
5917.15976, 0.28467
5934.7181, 0.27533
5952.38095, 0.25233
5970.14925, 0.24
5988.02395, 0.21367
6006.00601, 0.18067
6024.09639, 0.18067
6042.29607, 0.18067
6060.60606, 0.18067
6079.02736, 0.20267
6097.56098, 0.22933
6116.20795, 0.25933
6134.96933, 0.271
6153.84615, 0.27833
6172.83951, 0.27067
6191.95046, 0.26433
6211.18012, 0.25167
6230.5296, 0.24533
6250, 0.21533
6269.59248, 0.19967
6289.30818, 0.18367
6309.14826, 0.18167
6329.11392, 0.19333
6349.20635, 0.223
6369.42675, 0.25067
6389.77636, 0.27867
6410.25641, 0.299
6430.86817, 0.29433
6451.6129, 0.285
6472.49191, 0.267
6493.50649, 0.255
6514.65798, 0.23667
6535.94771, 0.21667
6557.37705, 0.21633
6578.94737, 0.21733
6600.66007, 0.22567
6622.51656, 0.24367
6644.51827, 0.26333
6666.66667, 0.28533
6688.96321, 0.29533
6711.4094, 0.28767
6734.00673, 0.279
6756.75676, 0.261
6779.66102, 0.25567
6802.72109, 0.262
6825.93857, 0.271
6849.31507, 0.294
6872.85223, 0.31667
6896.55172, 0.33833
6920.41522, 0.35967
6944.44444, 0.36767
6968.64111, 0.36133
6993.00699, 0.343
7017.54386, 0.319
7042.25352, 0.298
7067.13781, 0.27867
7092.19858, 0.279
7117.43772, 0.28933
7142.85714, 0.284
7168.45878, 0.31167
7194.2446, 0.29533
7220.21661, 0.30167
7246.37681, 0.31733
7272.72727, 0.30233
7299.27007, 0.296
7326.00733, 0.28667
7352.94118, 0.29233
7380.0738, 0.30633
7407.40741, 0.29733
7434.94424, 0.295
7462.68657, 0.30167
7490.6367, 0.30967
7518.79699, 0.30567
7547.16981, 0.29933
7575.75758, 0.284
7604.56274, 0.29733
7633.58779, 0.31933
7662.83525, 0.33867
7692.30769, 0.34567
7722.00772, 0.34433
7751.93798, 0.35
7782.10117, 0.345
7812.5, 0.34133
7843.13725, 0.32533
7874.01575, 0.324
7905.13834, 0.35767
7936.50794, 0.37833
7968.12749, 0.34
8000, 0.325
8032.12851, 0.32833
8064.51613, 0.33033
8097.16599, 0.33
8130.0813, 0.33133
8163.26531, 0.33333
8196.72131, 0.34467
8230.45267, 0.351
8264.46281, 0.34933
8298.75519, 0.35167
8333.33333, 0.35867
8368.20084, 0.36267
8403.36134, 0.36133
8438.81857, 0.363
8474.57627, 0.37
8510.6383, 0.38033
8547.00855, 0.373
8583.69099, 0.37567
8620.68966, 0.381
8658.00866, 0.39733
8695.65217, 0.386
8733.62445, 0.39133
8771.92982, 0.40667
8810.57269, 0.41
8849.55752, 0.39667
8888.88889, 0.406
8928.57143, 0.41067
8968.60987, 0.40667
9009.00901, 0.40867
9049.77376, 0.414
9090.90909, 0.423
9132.42009, 0.411
9174.31193, 0.41633
9216.58986, 0.42567
9259.25926, 0.42333
9302.32558, 0.418
9345.79439, 0.42467
9389.67136, 0.417
9433.96226, 0.41333
9478.67299, 0.42367
9523.80952, 0.422
9569.37799, 0.41333
9615.38462, 0.418
9661.83575, 0.41267
9708.73786, 0.406
9756.09756, 0.413
9803.92157, 0.411
9852.21675, 0.403
9900.9901, 0.40767
9950.24876, 0.408
10000, 0.39833
10020.04008, 0.39045
10040.16064, 0.38045
10060.36217, 0.38545
10080.64516, 0.41045
10101.0101, 0.42295
10121.45749, 0.40045
10141.98783, 0.41045
10162.60163, 0.43295
10183.29939, 0.44795
10204.08163, 0.42045
10224.94888, 0.43545
10245.90164, 0.41545
10266.94045, 0.41045
10288.06584, 0.43545
10309.27835, 0.40795
10330.57851, 0.40045
10351.96687, 0.43295
10373.44398, 0.40295
10395.0104, 0.41545
10416.66667, 0.40795
10438.41336, 0.41795
10460.25105, 0.42545
10482.18029, 0.41545
10504.20168, 0.40545
10526.31579, 0.41045
10548.52321, 0.39045
10570.82452, 0.40545
10593.22034, 0.40795
10615.71125, 0.41545
10638.29787, 0.41045
10660.98081, 0.42295
10683.76068, 0.43545
10706.63812, 0.42045
10729.61373, 0.42045
10752.68817, 0.42045
10775.86207, 0.42545
10799.13607, 0.41295
10822.51082, 0.41545
10845.98698, 0.42795
10869.56522, 0.42295
10893.24619, 0.42295
10917.03057, 0.42545
10940.91904, 0.44545
10964.91228, 0.45795
10989.01099, 0.44795
11013.21586, 0.42545
11037.52759, 0.43545
11061.9469, 0.43045
11086.4745, 0.42795
11111.11111, 0.43295
11135.85746, 0.43545
11160.71429, 0.44295
11185.68233, 0.44795
11210.76233, 0.46795
11235.95506, 0.46795
11261.26126, 0.44795
11286.68172, 0.46295
11312.21719, 0.46795
11337.86848, 0.44795
11363.63636, 0.44795
11389.52164, 0.45795
11415.52511, 0.46795
11441.6476, 0.46795
11467.88991, 0.47295
11494.25287, 0.47295
11520.73733, 0.46795
11547.34411, 0.48545
11574.07407, 0.48295
11600.92807, 0.49045
11627.90698, 0.48545
11655.01166, 0.47545
11682.24299, 0.49545
11709.60187, 0.49795
11737.0892, 0.51795
11764.70588, 0.52545
11792.45283, 0.49795
11820.33097, 0.49795
11848.34123, 0.51795
11876.48456, 0.51795
11904.7619, 0.51045
11933.17422, 0.51545
11961.72249, 0.52295
11990.40767, 0.53045
12019.23077, 0.54295
12048.19277, 0.53295
12077.29469, 0.54045
12106.53753, 0.52295
12135.92233, 0.54295
12165.45012, 0.54795
12195.12195, 0.56295
12224.93888, 0.56045
12254.90196, 0.56795
12285.01229, 0.58795
12315.27094, 0.57795
12345.67901, 0.57045
12376.23762, 0.59795
12406.94789, 0.58045
12437.81095, 0.59795
12468.82793, 0.59545
12500, 0.61545
12531.32832, 0.59795
12562.81407, 0.62295
12594.45844, 0.63045
12626.26263, 0.62545
12658.22785, 0.62795
12690.35533, 0.64295
12722.64631, 0.65295
12755.10204, 0.67045
12787.72379, 0.67295
12820.51282, 0.67295
12853.47044, 0.69045
12886.59794, 0.67795
12919.89664, 0.69045
12953.36788, 0.69295
12987.01299, 0.72295
13020.83333, 0.72795
13054.83029, 0.73045
13089.00524, 0.74295
13123.35958, 0.74795
13157.89474, 0.75545
13192.61214, 0.77045
13227.51323, 0.79045
13262.59947, 0.80295
13297.87234, 0.81295
13333.33333, 0.81545
13368.98396, 0.84045
13404.82574, 0.86545
13440.86022, 0.89795
13477.08895, 0.91295
13513.51351, 0.91795
13550.1355, 0.92545
13586.95652, 0.98295
13623.9782, 1.00045
13661.20219, 1.02045
13698.63014, 1.02545
13736.26374, 1.0392
13774.10468, 1.1092
13812.1547, 1.1417
13850.41551, 1.1917
13888.88889, 1.2342
13927.5766, 1.2842
13966.48045, 1.3442
14005.60224, 1.4067
14044.94382, 1.4917
14084.50704, 1.5592
14124.29379, 1.6717
14164.30595, 1.7567
14204.54545, 1.8767
14245.01425, 1.9892
14285.71429, 2.1367
14326.64756, 2.3042
14367.81609, 2.4717
14409.2219, 2.6492
14450.86705, 2.8217
14492.75362, 3.0017
14534.88372, 3.2267
14577.25948, 3.4692
14619.88304, 3.6267
14662.7566, 3.6517
14705.88235, 3.6242
14749.26254, 3.6642
14792.89941, 3.8367
14836.79525, 4.0542
14880.95238, 4.2867
14925.37313, 4.4867
14970.05988, 4.7392
15015.01502, 4.9967
15060.24096, 5.2417
15105.74018, 5.5167
15151.51515, 5.8267
15197.56839, 6.1217
15243.90244, 6.4792
15290.51988, 6.8567
15337.42331, 7.2067
15384.61538, 7.5092
15432.09877, 7.8167
15479.87616, 8.0642
15527.95031, 8.3242
15576.32399, 8.6017
15625, 8.8192
15673.98119, 9.0642
15723.27044, 9.3842
15772.87066, 9.7192
15822.78481, 10.0117
15873.01587, 10.2617
15923.56688, 10.5292
15974.44089, 10.7892
16025.64103, 10.9817
16077.17042, 11.1992
16129.03226, 11.3742
16181.22977, 11.5417
16233.76623, 11.6317
16286.64495, 11.7367
16339.86928, 11.8367
16393.44262, 11.9017
16447.36842, 11.9592
16501.65017, 12.0017
16556.29139, 12.0417
16611.29568, 12.0667
16666.66667, 12.0517
16722.40803, 12.0592
16778.52349, 12.0317
16835.01684, 11.9842
16891.89189, 11.8792
16949.15254, 11.7817
17006.80272, 11.6542
17064.84642, 11.5442
17123.28767, 11.3592
17182.13058, 11.1792
17241.37931, 10.9942
17301.03806, 10.7967
17361.11111, 10.5517
17421.60279, 10.3017
17482.51748, 10.0592
17543.85965, 9.7917
17605.6338, 9.5392
17667.84452, 9.2442
17730.49645, 8.9692
17793.59431, 8.6667
17857.14286, 8.3667
17921.14695, 8.0942
17985.61151, 7.7767
18050.54152, 7.4542
18115.94203, 7.1717
18181.81818, 6.8867
18248.17518, 6.5992
18315.01832, 6.3567
18382.35294, 6.1042
18450.1845, 5.8642
18518.51852, 5.6767
18587.36059, 5.4742
18656.71642, 5.3092
18726.59176, 5.1467
18796.99248, 5.0142
18867.92453, 4.8967
18939.39394, 4.7942
19011.40684, 4.7192
19083.96947, 4.6567
19157.08812, 4.5992
19230.76923, 4.5867
19305.01931, 4.5892
19379.84496, 4.6092
19455.25292, 4.6667
19531.25, 4.7442
19607.84314, 4.8542
19685.03937, 4.9767
19762.84585, 5.1517
19841.26984, 5.3192
19920.31873, 5.5042
20000, 5.7392
20080.32129, 5.9742
20161.29032, 6.2317
20242.91498, 6.4742
20325.20325, 6.7467
20408.16327, 7.0392
20491.80328, 7.3492
20576.13169, 7.6892
20661.15702, 8.0217
20746.88797, 8.3817
20833.33333, 8.7242
20920.50209, 9.0842
21008.40336, 9.4167
21097.04641, 9.7292
21186.44068, 10.0092
21276.59574, 10.3592
21367.52137, 10.7217
21459.22747, 11.0692
21551.72414, 11.4192
21645.02165, 11.7242
21739.13043, 12.0142
21834.06114, 12.2642
21929.82456, 12.4967
22026.43172, 12.6867
22123.89381, 12.8717
22222.22222, 13.0367
22271.71492, 13.0937
22321.42857, 13.1162
22371.36465, 13.1587
22421.52466, 13.1712
22471.91011, 13.0912
22522.52252, 13.1262
22573.36343, 13.1287
22624.43439, 13.0987
22675.73696, 13.0787
22727.27273, 13.1012
22779.04328, 13.0837
22831.05023, 13.0987
22883.29519, 13.0787
22935.77982, 13.0887
22988.50575, 13.0612
23041.47465, 13.0712
23094.68822, 13.0287
23148.14815, 12.9762
23201.85615, 12.9062
23255.81395, 12.8887
23310.02331, 12.8162
23364.48598, 12.8112
23419.20375, 12.7812
23474.1784, 12.7412
23529.41176, 12.7637
23584.90566, 12.7412
23640.66194, 12.7162
23696.68246, 12.6387
23752.96912, 12.5987
23809.52381, 12.5787
23866.34845, 12.4562
23923.44498, 12.4512
23980.81535, 12.3162
24038.46154, 12.2762
24096.38554, 12.2237
24154.58937, 12.2087
24213.07506, 12.1287
24271.84466, 12.0987
24330.90024, 12.0312
24390.2439, 11.9237
24449.87775, 11.8187
24509.80392, 11.7162
24570.02457, 11.6137
24630.54187, 11.4987
24691.35802, 11.3287
24752.47525, 11.2512
24813.89578, 11.0362
24875.62189, 10.9212
24937.65586, 10.7012
25000, 10.5637
25062.65664, 10.4112
25125.62814, 10.1662
25188.91688, 9.9337
25252.52525, 9.7462
25316.4557, 9.4987
25380.71066, 9.2887
25445.29262, 9.0287
25510.20408, 8.8137
25575.44757, 8.5837
25641.02564, 8.3762
25706.94087, 8.1312
25773.19588, 7.9562
25839.79328, 7.7637
25906.73575, 7.5962
25974.02597, 7.3337
26041.66667, 7.1762
26109.66057, 6.9912
26178.01047, 6.7987
26246.71916, 6.5512
26315.78947, 6.3387
26385.22427, 6.1787
26455.02646, 6.0462
26525.19894, 5.9012
26595.74468, 5.7412
26666.66667, 5.6087
26737.96791, 5.4337
26809.65147, 5.3462
26881.72043, 5.2812
26954.1779, 5.2237
27027.02703, 5.0962
27100.271, 5.0237
27173.91304, 4.9237
27247.9564, 4.8787
27322.40437, 4.8687
27397.26027, 4.7662
27472.52747, 4.7337
27548.20937, 4.7187
27624.30939, 4.7687
27700.83102, 4.8487
27777.77778, 4.8287
27855.1532, 4.7362
27932.96089, 4.7837
28011.20448, 4.8112
28089.88764, 4.8162
28169.01408, 4.7912
28248.58757, 4.8712
28328.6119, 4.9562
28409.09091, 5.0312
28490.02849, 5.1737
28571.42857, 5.2412
28612.30329, 5.24795
28653.29513, 5.34795
28694.40459, 5.40295
28735.63218, 5.47795
28776.97842, 5.53545
28818.4438, 5.59295
28860.02886, 5.64045
28901.7341, 5.77795
28943.56006, 5.79795
28985.50725, 5.87545
29027.5762, 5.97045
29069.76744, 6.09295
29112.08151, 6.12045
29154.51895, 6.19795
29197.08029, 6.28295
29239.76608, 6.30545
29282.57687, 6.32795
29325.5132, 6.43795
29368.57562, 6.53045
29411.76471, 6.57795
29455.081, 6.63795
29498.52507, 6.75295
29542.09749, 6.84045
29585.79882, 6.95295
29629.62963, 7.01545
29673.5905, 7.07795
29717.68202, 7.15045
29761.90476, 7.22795
29806.25931, 7.33045
29850.74627, 7.46545
29895.36622, 7.49295
29940.11976, 7.65545
29985.0075, 7.77295
30030.03003, 7.87295
30075.18797, 8.01045
30120.48193, 8.10045
30165.91252, 8.24295
30211.48036, 8.28045
30257.18608, 8.42295
30303.0303, 8.54295
30349.01366, 8.72795
30395.13678, 8.81545
30441.4003, 8.98295
30487.80488, 9.10795
30534.35115, 9.26295
30581.03976, 9.33045
30627.87136, 9.46295
30674.84663, 9.60795
30721.96621, 9.78295
30769.23077, 9.85295
30816.64099, 10.01795
30864.19753, 10.11545
30911.90108, 10.36545
30959.75232, 10.39795
31007.75194, 10.57795
31055.90062, 10.78545
31104.19907, 11.00795
31152.64798, 11.15295
31201.24805, 11.27295
31250, 11.47795
31298.90454, 11.63795
31347.96238, 11.89545
31397.17425, 12.00045
31446.54088, 12.26795
31496.06299, 12.39045
31545.74132, 12.56545
31595.57662, 12.77045
31645.56962, 12.96545
31695.72108, 13.21795
31746.03175, 13.46545
31796.50238, 13.68795
31847.13376, 13.75795
31897.92663, 14.06795
31948.88179, 14.23795
32000, 14.53045
32051.28205, 14.80545
32102.72873, 14.97295
32154.34084, 15.31295
32206.11916, 15.51045
32258.06452, 15.88545
32310.17771, 16.05295
32362.45955, 16.43295
32414.91086, 16.56795
32467.53247, 16.91545
32520.3252, 17.47545
32573.2899, 17.82545
32626.42741, 18.33545
32679.73856, 18.78295
32733.22422, 19.06795
32786.88525, 19.76295
32840.7225, 20.41795
32894.73684, 21.18295
32948.92916, 21.60045
33003.30033, 22.45295
33057.85124, 23.76795
33112.58278, 24.52795
33167.49585, 25.58295
33222.59136, 27.06545
33277.87022, 28.53295
33333.33333, 29.90795