Triphylite, GRR 176 b, Center Strafford, New Hampshire 0.261 mm, E||a = 5.97 A = beta, Room Temp 326., .5734 327.2, .549 328.8, .527 330.7, .502 332.6, .482 334., .466 334.7, .457 335.3, .45 336.4, .439 336.9, .432 337.7, .424 338.4, .419 339., .414 339.6, .412 340.7, .41 341.9, .413 343., .42 343.6, .426 344.1, .431 344.4, .44 345., .431 345.3, .422 345.6, .414 346.7, .404 347.2, .396 348.2, .389 349.1, .384 350.3, .377 351.5, .373 353.1, .37 354.8, .368 356.6, .37 357.6, .375 358.4, .378 359.1, .383 360., .384 361., .381 362.5, .376 363.7, .374 364.9, .37 365.2, .369 366.1, .369 367.2, .364 367.6, .356 368.2, .349 368.6, .338 369.3, .33 370.4, .323 371.7, .316 373.3, .309 375.2, .302 376.6, .297 377.6, .294 379.5, .291 381.4, .291 383.1, .294 384.4, .299 385.9, .304 386.6, .307 387.3, .312 388.2, .316 389.3, .32 390.4, .323 391.2, .326 392.1, .324 392.5, .318 393.8, .311 394.4, .305 394.9, .3 395.5, .296 396.2, .293 397.3, .294 398.8, .299 399.9, .306 401.2, .312 401.6, .325 402.7, .339 403.3, .347 403.9, .355 404.3, .359 405.2, .362 405.6, .366 405.9, .376 406.5, .407 406.7, .433 407., .482 407.3, .526 407.5, .544 407.8, .521 408., .5 408.2, .483 408.3, .465 408.5, .457 408.6, .467 408.9, .45 409.1, .442 409.6, .446 409.9, .449 410.1, .442 410.5, .43 410.6, .419 410.9, .401 411.2, .386 411.8, .37 412.5, .316 413.6, .293 414.6, .278 415.6, .268 417.6, .262 420.5, .259 423.7, .258 427.6, .257 430.2, .254 433.5, .252 437.4, .256 440.8, .262 442.6, .266 445., .27 446.7, .274 449.6, .28 452., .284 453.9, .286 455.8, .29 457.6, .29 458.9, .288 460.6, .286 462.1, .285 463.8, .29 465.3, .297 466.8, .312 467.7, .328 468.4, .346 469.4, .365 469.9, .379 470.5, .387 471.2, .378 471.5, .363 472.2, .342 473.2, .317 473.9, .291 474.9, .273 476.3, .258 477.4, .248 478.5, .244 480.4, .242 482.8, .245 485., .252 487., .26 488.9, .27 490.5, .279 491.2, .287 491.7, .291 492.7, .29 494.5, .293 495.8, .298 496.3, .303 496.9, .305 497.6, .299 498.8, .29 499.6, .279 500.6, .266 502.1, .248 502.8, .236 504.1, .227 506.3, .219 508.1, .213 514.6, .208 518.9, .207 523., .206 527.1, .202 529.5, .2 534.6, .197 539.2, .198 543.5, .2 546.6, .202 550.3, .205 554.4, .207 558.2, .208 563.2, .207 567.4, .204 572.2, .2 577.3, .196 582.4, .191 593.7, .18 600.1, .176 605.1, .172 610.5, .166 615.5, .158 619.7, .152 622.7, .149 629., .144 632.9, .142 637.8, .141 648.7, .141 655.5, .143 661.9, .145 669.1, .146 673.6, .147 678.6, .148 687.6, .149 693.4, .149 698.5, .149 704.7, .147 710.8, .146 714.9, .144 725.3, .141 733.5, .138 748., .135 758.1, .133 767.7, .132 773.7, .131 783.7, .131 792.4, .132 799.9, .135 807.1, .137 828.3, .145 841.7, .152 858.7, .163 874.7, .173 891.9, .184 906.4, .194 924.7, .206 944.4, .221 959.3, .233 973.8, .245 987.7, .256 998.7, .265 1015.7, .278 1025.1, .284 1036.8, .29 1052.3, .294 1066.9, .297 1086.5, .294 1099.6, .29 1110.8, .287 1130.1, .279 1147.1, .275 1160.7, .273 1175.1, .273 1192.6, .274 1207., .28 1216.9, .284 1307.7, .346 1318.9, .358 1328.4, .367 1341.1, .377 1352.5, .385 1364., .392 1377.7, .398 1387.8, .401 1401., .404 1416.8, .405 1432.4, .404 1448.4, .4 1460.3, .396 1473.4, .388 1480.5, .384 1496.8, .372 1504.4, .365 1515.9, .356 1528.1, .344 1541.1, .332 1547.5, .326 1553.8, .317 1564.9, .305 1573.1, .296 1582.4, .286 1590.3, .277 1595.8, .27 1610.6, .255 1629.2, .231 1651.1, .205 1675.4, .175 1688.7, .162 1710.3, .142 1724.3, .13 1741.5, .117 1753.9, .109 1771., .096 1785., .087 1812.3, .073 1829.9, .066 1850.9, .058 1869.8, .049 1889.8, .041 1910., .035 1931.3, .03 1956.5, .026 1981., .02 2006.8, .018 2030., .017 2049.7, .017 2063.4, .016 2072.7, .016