![]() |
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 |
Mineevite-(Y) | 1.51 ε | 1.536 ω | U- | .0260 | No | |
Brugnatellite # | 1.51 ε | 1.54 ω | U- | .0300 | No | |
Ankerite # | 1.51 to 1.55 ε | 1.69 to 1.75 ω | U- | .1800 to .2000 | No | none |
Mellite # | 1.511 ε | 1.539 ω | U- | .0280 | Yes | none |
Leifite # | 1.5117 ω | 1.5224 ε | U+ | .0107 | No | |
Tachyhydrite # | 1.512 ε | 1.52 ω | U- | .0080 | No | |
Zemkorite | 1.513 ε | 1.535 ω | U- | .0220 | No | |
Zincaluminite # | 1.514 ε | 1.534 ω | U- | .0200 | No | |
Basaluminite ? | 1.515 to 1.519 ω | 1.515 to 1.519 ε | U+ | .0000 | No | |
Felsobanyaite # | 1.516 ω | 1.533 ε | U+ | .0170 | No | |
Stichtite # | 1.516 ω | 1.542 ε | U+ | .0260 | Yes | |
Carletonite | 1.517 ε | 1.521 ω | U- | .0040 | Yes | |
Davyne # | 1.517 to 1.522 ω | 1.518 to 1.527 ε | U+ | .0010 to .0050 | No | |
Ammonioleucite | 1.518 ω | 1.518 ε | U+ | .0000 | No | |
Norsethite | 1.519 ε | 1.694 ω | U- | .1750 | No | |
Andersonite # | 1.52 ω | 1.54 ε | U+ | .0200 | No | |
Koenenite # | 1.52 ω | 1.55 ε | U+ | .0300 | No | |
Virgilite | ε | 1.52 ω | U- | No | ||
Microsommite # | 1.521 ω | 1.529 ε | U+ | .0080 | No | |
Zirklerite # | 1.522 ω | 1.552 ε | U+ | .0300 | No | |
Scapolite * | 1.522 to 1.571 ε | 1.534 to 1.607 ω | U- | .0120 to .0360 | Yes | none |
Afghanite | 1.523 ω | 1.529 ε | U+ | .0060 | No | |
Buryatite ! | 1.523 ω | 1.532 ε | U+ | .0090 | No | |
Weddellite # | 1.523 ω | 1.544 ε | U+ | .0210 | No | |
Berlinite # | 1.5235 ω | 1.529 ε | U+ | .0055 | No | |
Kalborsite | 1.525 ω | 1.525 ε | U+ | .0000 | No | |
Kaliophilite # | 1.527 ε | 1.532 ω | U- | .0050 | No | |
Roggianite | 1.527 ω | 1.535 ε | U+ | .0080 | No | |
Eucryptite # | 1.527 ω | 1.586 ε | U+ | .0590 | No | |
Olekminskite | 1.527 ε | 1.67 ω | U- | .1430 | No | |
Paralstonite | 1.527 ε | 1.672 ω | U- | .1450 | No | |
Benstonite | 1.527 ε | 1.69 ω | U- | .1630 | Yes | |
Liottite | 1.528 ε | 1.53 ω | U- | .0020 | No | |
Tounkite | 1.528 ω | 1.543 ε | U+ | .0150 | Yes | |
Nepheline # | 1.528 to 1.544 ε | 1.531 to 1.549 ω | U- | .0030 to .0050 | Yes | none |
Quadridavyne | 1.529 ω | 1.532 ε | U+ | .0030 | No | |
Barbertonite # | 1.529 ε | 1.557 ω | U- | .0280 | No | |
Milarite # | 1.529 to 1.548 ε | 1.532 to 1.551 ω | U- | .0030 | Yes | |
Truscottite # | 1.53 ε | 1.552 ω | U- | .0220 | No | |
Apophyllite-(KF) | 1.53 to 1.536 ω | 1.532 to 1.538 ε | U+ | .0020 | No | |
Megakalsilite ! | 1.531 ε | 1.538 ω | U- | .0070 | No | |
Telyushenkoite ! | 1.531 ω | 1.562 ε | U+ | .0310 | Yes | |
Hydroxylborite ! | 1.531 ε | 1.566 ω | U- | .0350 | No | |
Caminite | 1.532 ε | 1.534 ω | U- | .0020 | No | |
Fibroferrite # | 1.532 ω | 1.57 ε | U+ | .0380 | No | |
Indialite # | 1.532 to 1.535 ε | 1.537 to 1.539 ω | U- | .0050 | Yes | |
Kalsilite # | 1.532 to 1.537 ε | 1.538 to 1.543 ω | U- | .0060 | No | |
Zincowoodwardite ! | 1.532 to 1.558 | U | No | |||
Quintinite-2H | 1.533 ω | 1.533 ε | U+ | .0000 | Yes | |
Quintinite-3T | 1.533 ε-ω | 1.533 ε-ω | U-+ | .0000 | No | |
Iowaite | 1.533 to 1.543 ε | 1.543 to 1.561 ω | U- | .0100 to .0180 | No | |
Karchevskyite ! | 1.534 ε | 1.542 ω | U- | .0080 | Yes | |
Fluoborite # | 1.534 ε | 1.57 ω | U- | .0360 | No | |
Stratlingite | ε | 1.534 ω | U- | No | ||
Apophyllite * | 1.535 ω | 1.537 ε | U+ | .0020 | Yes | none |
Panunzite | 1.535 ε | 1.54 ω | U- | .0050 | No | |
Woodallite ! | 1.535 ε | 1.555 ω | U- | .0200 | Yes | |
Zakharovite | 1.535 ε | 1.565 ω | U- | .0300 | No | |
Kutnohorite # | 1.535 ε | 1.727 ω | U- | .1920 | No | |
Yagiite | 1.536 ω | 1.544 ε | U+ | .0080 | No | |
Ashcroftine-(Ce) * | 1.536 ω | 1.545 ε | U+ | .0090 | No | |
Ashcroftine-(Y) # | 1.536 to 1.537 ω | 1.545 to 1.549 ε | U+ | .0090 to .0120 | No | |
Marialite # | 1.537 ε | 1.539 ω | U- | .0020 | Yes | |
Roedderite | 1.537 ω | 1.542 ε | U+ | .0050 | No | |
Reederite-(Y) ! | 1.537 ε | 1.548 ω | U- | .0110 | Yes | |
Arsenuranospathite | 1.538 ε | 1.542 ω | U- | .0040 | No | |
Sheldrickite ! | 1.538 ω | 1.563 ε | U+ | .0250 | No | |
Gordaite ! | 1.5382 ε | 1.5607 ω | U- | .0225 | Yes | |
Sinjarite | 1.54 | 1.54 | U | .0000 | No | |
Jouravskite | 1.54 ε | 1.556 ω | U- | .0160 | Yes | |
Carrboydite | 1.54 ε | 1.56 ω | U- | .0200 | No | |
Chlormagaluminite | 1.54 ω | 1.56 ε | U+ | .0200 | No | |
Osumilite-(Mg) | 1.5406 ω | 1.543 ε | U+ | .0024 | No | |
Apophyllite-(KOH) | 1.542 ω | 1.543 ε | U+ | .0010 | No | |
Theresemagnanite | 1.542 ε | 1.568 ω | U- | .0260 | No | |
Lukechangite-(Ce) ! | 1.542 ε | 1.728 ω | U- | .1860 | Yes | |
Pyroaurite # | 1.543 ε | 1.564 ω | U- | .0210 | No | |
Eifelite | 1.543 to 1.5445 ω | 1.5443 to 1.5458 ε | U+ | .0013 | No | |
Quartz # | 1.543 to 1.545 ω | 1.552 to 1.554 ε | U+ | .0090 | Yes | none |
Guarinoite | 1.544 ε | 1.584 ω | U- | .0400 | Yes | |
Monohydrocalcite | 1.545 ω | 1.59 ε | U+ | .0450 | Yes | |
Osumilite-(Fe) # | 1.545 to 1.547 ω | 1.549 to 1.551 ε | U+ | .0040 | Yes | |
Shigaite | ε | 1.546 ω | U- | Yes | ||
Desautelsite | 1.547 ε | 1.569 ω | U- | .0220 | Yes | |
Portlandite # | 1.547 ε | 1.574 ω | U- | .0270 | No | |
Charmarite-2H | 1.547 ε | 1.587 ω | U- | .0400 | No | |
Charmarite-3T | 1.547 ε | 1.587 ω | U- | .0400 | No | |
Lovozerite # | 1.549 ε | 1.561 ω | U- | .0120 | No | |
Hydrowoodwardite ! | 1.549 ω | 1.565 ε | U+ | .0160 | No | |
Kalistrontite | 1.549 ε | 1.569 ω | U- | .0200 | No | |
Paracoquimbite # | 1.55 ω | 1.555 ε | U+ | .0050 | No | |
Coquimbite # | 1.55 ω | 1.557 ε | U+ | .0070 | Yes | none |
Bassanite # | 1.55 ω | 1.57 ε | U+ | .0200 | No | |
Sjogrenite # | 1.55 ε | 1.573 ω | U- | .0230 | No | |
Vaterite # | 1.55 ω | 1.65 ε | U+ | .1000 | No | |
Minrecordite | 1.55 ε | 1.75 ω | U- | .2000 | No | |
Meionite # | 1.55 to 1.56 ε | 1.58 to 1.6 ω | U- | .0300 to .0400 | No | |
Tiptopite | 1.551 ω | 1.559 ε | U+ | .0080 | No | |
Friedrichbeckeite ! | 1.552 ω | 1.561 ε | U+ | .0090 | Yes | |
Chalcophyllite # | 1.552 to 1.575 ε | 1.618 to 1.632 ω | U- | .0660 | No | none |