Copiapite, GRR 167, Alcaparrosa, Chile,  (poor surface polish)
0.180 mm, gamma, Room Temp, 5/8/82
2291.1, .1
2283.7, .091
2274.8, .082
2265.1, .076
2253.9, .071
2244.1, .07
2235.8, .07
2228.3, .072
2224.5, .073
2219.2, .073
2213.2, .073
2208., .072
2205., .072
2200.6, .07
2197.7, .069
2194.8, .068
2193.3, .067
2191.1, .064
2188.9, .065
2186.7, .064
2184.4, .064
2181.5, .064
2176.2, .067
2171.7, .069
2166.4, .072
2161.2, .074
2155.1, .077
2146.9, .079
2141.6, .081
2134.1, .083
2130.3, .086
2125.8, .089
2120.5, .092
2114.4, .096
2110.7, .099
2105.4, .103
2100.1, .105
2096.3, .108
2091.8, .111
2088.7, .113
2084.9, .116
2081.2, .119
2076.6, .125
2071.3, .13
2065.9, .136
2061.4, .142
2058.3, .147
2055.2, .152
2052.2, .158
2049.1, .163
2045.3, .169
2042.9, .173
2039.1, .18
2033.8, .188
2029.9, .195
2026.1, .202
2023., .209
2019.9, .213
2016.1, .22
2013.1, .224
2009.3, .228
2006.2, .231
2000.9, .234
1997.9, .237
1993.2, .241
1990.9, .245
1989.3, .249
1986.2, .255
1983.9, .259
1983., .264
1982.2, .269
1981.4, .274
1979.8, .279
1978.2, .284
1976.6, .287
1972.8, .287
1970.6, .285
1969.1, .283
1968.4, .282
1966.9, .279
1966.2, .276
1964.7, .273
1963.9, .271
1963.2, .269
1961.7, .266
1961., .263
1959.6, .26
1958.8, .258
1956.5, .259
1955., .26
1954.2, .263
1953.4, .266
1952.6, .271
1951.8, .273
1950.9, .278
1950.1, .286
1948.5, .289
1947.7, .293
1946.1, .296
1943.8, .297
1942.4, .293
1941.6, .29
1941., .285
1940.2, .282
1939.6, .276
1938.9, .272
1938.2, .265
1937.6, .257
1936.9, .251
1937., .24
1936.3, .236
1935.6, .232
1934.2, .228
1933.5, .221
1932.8, .216
1932.9, .207
1932.3, .195
1931.7, .187
1931.8, .18
1931.1, .176
1930.4, .172
1929.7, .169
1929.8, .16
1929.1, .154
1928.5, .146
1927., .142
1926.4, .133
1925.7, .126
1925., .123
1924.3, .12
1923.6, .112
1922.2, .106
1921.5, .102
1920.8, .096
1920.1, .093
1920.2, .085
1919.5, .079
1918.9, .072
1918.2, .068
1916.7, .062
1916., .058
1915.3, .054
1913.9, .049
1913.2, .045
1912.5, .04
1911.8, .036
1910.4, .029
1909., .02
1906.8, .015
1906., .012
1903.8, .007
1903.1, .003
1902.4, -.002
1901.7, -.004
1899.5, -.012
1898.8, -.015
1898.1, -.019
1895.1, -.023
1894.4, -.026
1893.7, -.029
1892.2, -.032
1890., -.035
1885.5, -.04
1883.3, -.043
1879.5, -.047
1876.5, -.049
1872.7, -.05
1869., -.051
1867.4, -.051
1865.2, -.054
1860.7, -.054
1852.3, -.054
1844.7, -.055
1835.6, -.055
1826.5, -.055
1821.2, -.056
1815.9, -.057
1808.3, -.057
1800.8, -.058
1789.4, -.059
1778., -.06
1767.4, -.061
1757.5, -.061
1745.4, -.061
1734., -.061
1724.1, -.061
1712., -.062
1700.6, -.062
1686.9, -.062
1678.6, -.062
1668.7, -.063
1661.2, -.065
1651.3, -.067
1643.8, -.068
1639.2, -.069
1629.4, -.072
1621.1, -.074
1612.7, -.076
1609.7, -.077
1599.9, -.079
1590.8, -.08
1581.8, -.081
1574.3, -.082
1565.3, -.082
1554., -.083
1541.2, -.084
1534.4, -.084
1526.1, -.085
1521.6, -.085
1514.1, -.086
1510.3, -.087
1507.3, -.088
1504.3, -.088
1499.1, -.09
1493.8, -.091
1486.3, -.091
1479.5, -.091
1474.9, -.09
1469.6, -.088
1466.6, -.086
1464.3, -.083
1462.7, -.079
1461.2, -.076
1460.4, -.072
1457.3, -.068
1452.8, -.067
1452., -.068
1450.6, -.07
1449.8, -.071
1449.1, -.075
1447.7, -.081
1446.2, -.084
1445.5, -.088
1444.1, -.092
1443.4, -.094
1441.9, -.097
1439.7, -.101
1439., -.104
1437.5, -.107
1433.8, -.111
1432.3, -.113
1429.4, -.116
1425.6, -.119
1421.9, -.123
1418.9, -.125
1413.7, -.129
1406.9, -.132
1403.9, -.134
1397.2, -.136
1390.4, -.138
1388.1, -.139
1383.6, -.138
1381.4, -.14
1378.4, -.139
1376.1, -.138
1373.9, -.138
1366.4, -.138
1358.1, -.139
1346.1, -.138
1337., -.137
1327.2, -.137
1318.2, -.136
1314.4, -.135
1306.1, -.135
1300.1, -.134
1291., -.133
1281.2, -.133
1272.2, -.132
1265.4, -.131
1258.6, -.131
1251.8, -.129
1244.2, -.129
1238.2, -.129
1232.9, -.128
1226.1, -.126
1219.3, -.125
1211.1, -.125
1206.5, -.124
1199.7, -.123
1192.9, -.122
1185.3, -.121
1178.5, -.12
1172.4, -.12
1170.1, -.119
1165.6, -.118
1162.5, -.117
1158.7, -.116
1154.1, -.116
1147.3, -.115
1142., -.114
1137.4, -.112
1132.8, -.112
1127.5, -.109
1120.6, -.108
1114.5, -.106
1109.2, -.105
1101.6, -.103
1096.2, -.101
1089.4, -.099
1084., -.097
1077.9, -.096
1071.1, -.092
1065.7, -.09
1059.6, -.087
1055., -.083
1051.2, -.081
1046.6, -.079
1042., -.077
1037.4, -.073
1032.1, -.07
1028.2, -.067
1025.9, -.065
1022.8, -.061
1019.7, -.057
1015.1, -.053
1011.3, -.048
1007.4, -.044
1003.5, -.039
1000.4, -.035
995.8, -.03
992.7, -.025
988.9, -.021
985., -.015
980.3, -.009
976.5, -.003
971.8, .002
968.7, .008
965.6, .014
962.5, .02
959.4, .026
956.3, .031
953.1, .037
949.3, .043
946.9, .048
943.8, .054
940.7, .06
938.4, .064
935.3, .069
932.9, .074
928.3, .081
924.4, .087
921.3, .092
918.2, .098
915.1, .102
912.7, .108
909.6, .113
907.3, .117
904.2, .119
901.9, .123
900.3, .127
898., .13
895.7, .134
892.6, .136
891.1, .138
888.8, .139
887.2, .142
884.9, .144
883.4, .146
881.1, .147
878., .149
875., .151
872.7, .152
869.6, .153
866.6, .154
865., .155
856.7, .158
852.1, .158
849.8, .158
843., .155
840., .154
838.5, .153
834., .151
829.4, .149
827.2, .147
824.2, .145
821.9, .143
818.9, .141
816.7, .138
813.7, .136
812.9, .135
809.9, .133
807.7, .131
804.7, .128
801.7, .126
799.4, .124
795., .12
792., .118
789., .115
785.3, .112
781.5, .109
777.1, .103
774.1, .1
771.1, .096
768.9, .094
767.4, .092
765.9, .091
763., .088
759.2, .085
754.8, .081
751.8, .078
749.5, .076
742.8, .072
740.6, .07
738.3, .068
736.1, .067
734.6, .066
732.4, .064
727.1, .063
718.8, .06
713.6, .059
709.8, .058
705.3, .057
700., .058
695.4, .058
690.9, .058
687.1, .059
682.6, .059
678.8, .062
676.5, .063
672.7, .065
670.4, .066
667.4, .067
665.1, .069
663.5, .07
662., .071
659.7, .073
658.1, .076
655.1, .079
652.8, .081
652., .081
649., .084
647.4, .085
645.9, .086
644.3, .088
642.8, .09
641.3, .092
639., .094
636.6, .097
634.3, .1
631.3, .104
628.9, .107
626.6, .11
625.1, .112
624.3, .115
622.7, .117
620.4, .12
618.9, .122
617.4, .125
615.8, .127
614.3, .129
611.2, .132
610.4, .136
608.1, .14
605., .144
601.1, .148
598.8, .152
595.7, .158
592.6, .163
590.3, .167
587.2, .173
584.1, .178
581., .183
577.9, .189
574.1, .194
571.7, .198
569.4, .203
566.3, .208
563.9, .214
561.6, .218
560., .222
557.7, .225
555.4, .23
553.1, .234
551.5, .237
549.2, .242
546.8, .245
544.5, .249
541.4, .253
539.9, .256
537.6, .258
536., .261
534.5, .264
532.2, .267
530.6, .271
528.3, .274
526.7, .277
525.2, .28
523.6, .282
522.1, .284
521.3, .287
519.8, .29
519., .293
516.6, .296
515.9, .299
515.1, .302
513.5, .304
512., .307
511.2, .309
510.4, .311
509.6, .315
508., .317
507.2, .322
506.4, .323
505.6, .325
504.8, .329
504., .331
503.3, .333
502.5, .334
501.7, .338
500., .35
496., .366
493.4, .386
490.1, .41
486.5, .446
482.8, .494
480., .535
476.1, .598
473., .662
470.5, .73