 |
Uniaxial Minerals sorted by Index of Refraction |
|
|
Uniaxial Minerals sorted by Index of Refraction |
( Bold - Valid Mineral Name)
(* - Mineral Name is Not IMA Approved)
(! - New Dana Classification Number Has Been Changed or Added)
(? - IMA Discredited Mineral Species Name)
(# - Grandfathered as valid)
Pages: [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] Optical Help
| Mineral Name | A | B | Sign | Bire | Pleo- chroic |
Dispersion |
| Malladrite # | 1.309 ε | 1.313 ω | U- | .0040 | No | |
| Ice # | 1.32 | 1.33 | U | .0100 | No | |
| Nitratine # | 1.33 to 1.336 ε | 1.58 to 1.587 ω | U- | .2500 to .2510 | No | |
| Demartinite ! | 1.34 ε | 1.35 ω | U- | .0100 | Yes | |
| Chiolite # | 1.342 ε | 1.349 ω | U- | .0070 | No | |
| Sellaite # | 1.378 ω | 1.39 ε | U+ | .0120 | No | |
| Colquiriite | 1.385 ε | 1.388 ω | U- | .0030 | No | |
| Bararite # | 1.391 ε | 1.406 ω | U- | .0150 | No | |
| Thomasclarkite-(Y) ! | 1.4 ε | 1.54 ω | U- | .1400 | No | |
| Rosenbergite | 1.403 ε | 1.427 ω | U- | .0240 | No | |
| Zhemchuzhnikovite | 1.408 ε | 1.479 ω | U- | .0710 | Yes | |
| Stepanovite # | 1.417 ε | 1.515 ω | U- | .0980 | Yes | |
| Humberstonite | 1.436 ε | 1.474 ω | U- | .0380 | No | |
| Paceite ! | 1.439 ω | 1.482 ε | U+ | .0430 | Yes | |
| Schairerite # | 1.44 ω | 1.445 ε | U+ | .0050 | No | |
| Butschliite # | 1.445 | 1.595 | U | .1500 | No | |
| Galeite # | 1.447 ω | 1.449 ε | U+ | .0020 | No | |
| Iquiqueite | 1.447 ε | 1.502 ω | U- | .0550 | No | |
| Ungemachite # | 1.449 ω | 1.502 ε | U+ | .0530 | No | |
| Covellite # | 1.45 ω | 2.62 ε | U+ | 1.1700 | Yes | |
| Eitelite # | 1.4502 ε | 1.6052 ω | U- | .1550 | No | |
| Erionite-Ca ! | 1.4711 ω | 1.474 ε | U+ | .0029 | No | |
| Erionite-Na # | 1.4711 ω | 1.474 ε | U+ | .0029 | No | |
| Erionite-K ! | 1.4711 ω | 1.474 ε | U+ | .0029 | No | |
| Mcallisterite | 1.459 ε | 1.504 ω | U- | .0450 | No | |
| Natrofairchildite | 1.459 ε | 1.525 ω | U- | .0660 | Yes | |
| Tincalconite # | 1.46 ω | 1.47 ε | U+ | .0100 | No | none |
| Lannonite | 1.46 ω | 1.478 ε | U+ | .0180 | No | |
| Acetamide | 1.46 ε | 1.495 ω | U- | .0350 | No | |
| Chrysocolla # | 1.46 ω | 1.57 ε | U+ | .1100 | Yes | none |
| Hanksite # | 1.461 ε | 1.481 ω | U- | .0200 | No | |
| Thaumasite # | 1.468 ε | 1.507 ω | U- | .0390 | Yes | none |
| Niveolanite ! | 1.469 ω | 1.502 ε | U+ | .0330 | No | |
| Ettringite # | 1.47 ε | 1.491 ω | U- | .0210 | No | |
| Archerite | 1.47 ε | 1.513 ω | U- | .0430 | No | |
| Mazzite-Na ! | 1.471 ω | 1.472 ε | U+ | .0010 | No | |
| Gmelinite-K ! | 1.471 ε | 1.477 ω | U- | .0060 | No | |
| Loweite # | 1.471 ε | 1.49 ω | U- | .0190 | No | |
| Herschelite ? | 1.471 to 1.479 ε | 1.474 to 1.481 ω | U- | .0030 | No | |
| Gagarinite-(Y) | 1.472 ω | 1.492 ε | U+ | .0200 | No | |
| Indigirite | 1.472 ω | 1.502 ε | U+ | .0300 | No | |
| Gmelinite-Ca ! | 1.474 to 1.481 ε-ω | 1.476 to 1.494 ε-ω | U-+ | .0020 to .0130 | No | |
| Gmelinite-Na # | 1.474 to 1.481 ε-ω | 1.476 to 1.494 ε-ω | U-+ | .0020 to .0130 | No | |
| Charlesite | 1.475 ε | 1.492 ω | U- | .0170 | No | |
| Wardsmithite | 1.476 ε | 1.49 ω | U- | .0140 | No | |
| Bentorite | 1.478 ω | 1.484 ε | U+ | .0060 | No | |
| Fairchildite # | 1.478 ε | 1.532 ω | U- | .0540 | No | |
| Carraraite ! | 1.479 ω | 1.509 ε | U+ | .0300 | No | |
| Biphosphammite # | 1.48 ε | 1.525 ω | U- | .0450 | No | |
| Grimselite | 1.48 ε | 1.601 ω | U- | .1210 | No | |
| Tetranatrolite ? | 1.481 ω | 1.496 ε | U+ | .0150 | Yes | |
| Wermlandite | 1.482 ε | 1.493 ω | U- | .0110 | No | anomalously biaxial |
| Tschernichite | 1.483 ε | 1.484 ω | U- | .0010 | No | |
| Zajacite-(Ce) | 1.483 ω | 1.503 ε | U+ | .0200 | Yes | |
| Urea | 1.484 ω | 1.603 ε | U+ | .1190 | No | |
| Kuzelite ! | 1.485 ε | 1.504 ω | U- | .0190 | Yes | |
| Berborite | 1.485 ε | 1.58 ω | U- | .0950 | No | |
| Sacrofanite | 1.486 ε | 1.505 ω | U- | .0190 | No | |
| Calcite # | 1.486 ε | 1.64 to 1.66 ω | U- | .1540 to .1740 | No | none |
| Offretite # | 1.486 to 1.492 ε | 1.489 to 1.495 ω | U- | .0030 | No | |
| Aphthitalite # | 1.487 to 1.491 ω | 1.492 to 1.499 ε | U+ | .0050 to .0080 | No | |
| Levyne-Na ! | 1.487 to 1.502 ε | 1.489 to 1.51 ω | U- | .0020 to .0080 | No | |
| Levyne-Ca # | 1.487 to 1.502 ε | 1.489 to 1.51 ω | U- | .0020 to .0080 | No | |
| Retgersite # | 1.4873 ε | 1.5109 ω | U- | .0236 | No | |
| Douglasite # | 1.488 ω | 1.5 ε | U+ | .0120 | No | |
| Vishnevite # | 1.488 to 1.495 ε | 1.49 to 1.507 ω | U- | .0020 to .0120 | No | |
| Cancrisilite | 1.49 ε | 1.509 ω | U- | .0190 | No | |
| Giuseppettite | 1.491 ω | 1.507 ε | U+ | .0160 | No | |
| Hydroxycancrinite | 1.494 ε | 1.501 ω | U- | .0070 | No | |
| Orschallite | 1.4941 ω | 1.496 ε | U+ | .0019 | No | |
| Marinellite ! | 1.495 ω | 1.497 ε | U+ | .0020 | Yes | |
| Antarcticite | 1.495 ε | 1.55 ω | U- | .0550 | No | |
| Cancrinite # | 1.495 to 1.503 ε | 1.507 to 1.528 ω | U- | .0120 to .0250 | Yes | none |
| Hydrotalcite # | 1.495 to 1.529 ε | 1.511 to 1.531 ω | U- | .0160 | No | |
| Tugtupite | 1.496 ω | 1.502 ε | U+ | .0060 | Yes | |
| Alloriite ! | 1.497 ω | 1.499 ε | U+ | .0020 | No | |
| Slavikite # | 1.497 to 1.506 ε | 1.506 to 1.53 ω | U- | .0090 to .0240 | Yes | |
| Farneseite ! | 1.499 ω | 1.503 ε | U+ | .0040 | Yes | |
| Mazzite-Mg | 1.499 ε | 1.5062 ω | U- | .0072 | No | |
| Sturmanite | 1.5 ω | 1.505 ε | U+ | .0050 | Yes | |
| Millosevichite # | 1.5 ω | 1.515 ε | U+ | .0150 | No | |
| Meixnerite | 1.5 ε | 1.517 ω | U- | .0170 | No | |
| Dolomite # | 1.5 ε | 1.679 to 1.681 ω | U- | .1790 to .1810 | Yes | none |
| Chabazite-Sr ! | 1.503 ω | 1.507 ε | U+ | .0040 | Yes | |
| Arnhemite * | 1.503 ε | 1.516 ω | U- | .0130 | No | |
| Teepleite # | 1.503 ε | 1.519 ω | U- | .0160 | No | |
| Micheelsenite ! | 1.503 ε | 1.532 ω | U- | .0290 | Yes | |
| Mikasaite | 1.504 ω | 1.518 ε | U+ | .0140 | No | |
| Pitiglianoite | 1.506 ε | 1.508 ω | U- | .0020 | No | |
| Bellbergite | 1.507 ε | 1.522 ω | U- | .0150 | Yes | |
| Chloraluminite # | 1.507 ε | 1.56 ω | U- | .0530 | No | |
| Magnesite # | 1.508 to 1.51 ε | 1.7 ω | U- | .1920 | No | none |
| Vlodavetsite ! | 1.509 ω | 1.526 ε | U+ | .0170 | Yes | |
| Motukoreaite | 1.51 | 1.51 | U | .0000 | No | |
| Chlorartinite ! | 1.51 | 1.51 | U | .0000 | Yes | |
| Thornasite | 1.51 ω | 1.512 ε | U+ | .0020 | Yes | |
| Franzinite | 1.51 ω | 1.512 ε | U+ | .0020 | No | |
| Francoanellite | 1.51 ω | 1.515 ε | U+ | .0050 | No | |
| Mountkeithite | 1.51 ε | 1.52 ω | U- | .0100 | No | |
| Manasseite # | 1.51 ε | 1.524 ω | U- | .0140 | No |