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Uniaxial Minerals sorted by Index of Refraction |
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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 |
| Parisite-(Nd) | 1.679 ω | 1.754 ε | U+ | .0750 | No | |
| Brockite | 1.68 ω | 1.695 ε | U+ | .0150 | No | |
| Natisite | 1.68 ε | 1.756 ω | U- | .0760 | No | |
| Pyrochroite # | 1.68 to 1.681 ε | 1.72 to 1.723 ω | U- | .0400 to .0420 | No | |
| Johnbaumite | 1.684 ε | 1.687 ω | U- | .0030 | Yes | |
| Comblainite | 1.684 ε | 1.69 ω | U- | .0060 | Yes | |
| Weilerite | 1.688 ε | 1.698 ω | U- | .0100 | No | |
| Rhabdophane-(Ce) # | 1.688 ω | 1.744 ε | U+ | .0560 | No | |
| Zalesiite ! | 1.688 ω | 1.765 ε | U+ | .0770 | Yes | |
| Ilimaussite-(Ce) | 1.689 ω | 1.695 ε | U+ | .0060 | No | |
| Willemite # | 1.691 to 1.72 ω | 1.719 to 1.73 ε | U+ | .0280 | No | |
| Florencite-(La) | 1.694 ω | 1.701 ε | U+ | .0070 | No | |
| Muirite | 1.697 ω | 1.704 ε | U+ | .0070 | Yes | |
| Svabite # | 1.698 ε | 1.706 ω | U- | .0080 | No | |
| Vesuvianite # | 1.698 to 1.736 ε | 1.702 to 1.742 ω | U- | .0040 to .0060 | Yes | |
| Fluorvesuvianite ! | 1.699 ε | 1.702 ω | U- | .0030 | Yes | |
| Alforsite | 1.7 ε | 1.7 ω | U- | .0000 | No | |
| Turneaureite | 1.7 ε | 1.708 ω | U- | .0080 | Yes | |
| Nelenite | 1.7 ε | 1.718 ω | U- | .0180 | Yes | |
| Wiserite # | 1.7 to 1.717 ε | 1.751 to 1.76 ω | U- | .0510 | No | |
| Tuite ! | 1.701 ω | 1.706 ε | U+ | .0050 | No | |
| Kemmlitzite | 1.701 ω | 1.707 ε | U+ | .0060 | No | |
| Agardite-(Y) | 1.701 ω | 1.782 ε | U+ | .0810 | Yes | |
| Traskite | 1.702 ε | 1.714 ω | U- | .0120 | Yes | |
| Peprossiite-(Ce) | 1.703 ω | 1.711 ε | U+ | .0080 | No | |
| Goudeyite | 1.704 ω | 1.765 ε | U+ | .0610 | Yes | |
| Diversilite-(Ce) ! | 1.705 ω | 1.708 ε | U+ | .0030 | Yes | |
| Juanitaite ! | 1.705 ε | 1.785 ω | U- | .0800 | Yes | |
| Berndtite | 1.705 ε | 1.93 ω | U- | .2250 | No | |
| Amakinite | 1.707 ω | 1.722 ε | U+ | .0150 | No | |
| Pretulite ! | 1.709 ω | 1.86 ε | U+ | .1510 | Yes | |
| Haydeeite ! | 1.71 ε | 1.753 ω | U- | .0430 | Yes | |
| Zdenekite | 1.71 ε | 1.77 ω | U- | .0600 | Yes | |
| Fencooperite ! | 1.711 ε | 1.723 ω | U- | .0120 | Yes | |
| Palmierite # | ε | 1.712 ω | U- | No | ||
| Jarosite # | 1.713 to 1.715 ε | 1.815 to 1.82 ω | U- | .1020 to .1050 | Yes | none |
| Hidalgoite # | 1.713 | U | No | |||
| Osarizawaite | 1.714 ω | 1.731 ε | U+ | .0170 | No | |
| Hematolite # | 1.714 ε | 1.733 ω | U- | .0190 | No | |
| Bariosincosite ! | 1.715 ε | 1.721 ω | U- | .0060 | Yes | |
| Jasmundite | 1.715 ω | 1.728 ε | U+ | .0130 | No | |
| Xenotime-(Yb) ! | 1.715 ω | 1.802 ε | U+ | .0870 | Yes | |
| Hydroxylbastnasite-(Nd) | 1.715 ω | 1.81 ε | U+ | .0950 | No | |
| Bastnasite-(Y) | 1.717 ω | 1.818 ε | U+ | .1010 | No | |
| Bastnasite-(La) | 1.717 ω | 1.818 ε | U+ | .1010 | No | |
| Bastnasite-(Ce) # | 1.717 ω | 1.818 ε | U+ | .1010 | No | none |
| Holtstamite ! | 1.718 ω | 1.746 ε | U+ | .0280 | Yes | |
| Satterlyite | 1.719 ε | 1.721 ω | U- | .0020 | Yes | |
| Manganvesuvianite ! | 1.719 ε | 1.731 ω | U- | .0120 | Yes | |
| Bromellite # | 1.719 ω | 1.733 ε | U+ | .0140 | No | |
| Parascorodite ! | 1.72 ε-ω | 1.72 ε-ω | U-+ | .0000 | No | |
| Tetrawickmanite | 1.72 ε | 1.724 ω | U- | .0040 | No | |
| Florencite-(Nd) | 1.72 ω | 1.73 ε | U+ | .0100 | No | |
| Melanocerite-(Ce) # | 1.72 ε | 1.73 ω | U- | .0100 | No | |
| Galileiite ! | 1.72 ω | 1.75 ε | U+ | .0300 | Yes | |
| Droninoite ! | 1.72 | U | No | |||
| Wiluite ! | 1.721 ω | 1.725 ε | U+ | .0040 | Yes | |
| Xenotime-(Y) # | 1.721 ω | 1.816 ε | U+ | .0950 | Yes | none |
| Vicanite-(Ce) | 1.722 ε | 1.757 ω | U- | .0350 | Yes | |
| Magnesiotaaffeite-2N2S | 1.722 ω | 1.777 ε | U+ | .0550 | No | |
| Chromdravite ! | 1.722 to 1.724 ε | 1.778 to 1.78 ω | U- | .0560 | Yes | |
| Connellite # | 1.724 to 1.738 ω | 1.746 to 1.758 ε | U+ | .0220 | Yes | none |
| Agardite-(Ce) ! | 1.725 ω | 1.81 ε | U+ | .0850 | Yes | |
| Plumboagardite ! | 1.726 ω | 1.805 ε | U+ | .0790 | No | |
| Kittatinnyite | ε | 1.727 ω | U- | Yes | ||
| Proshchenkoite-(Y) ! | 1.728 ε | 1.734 ω | U- | .0060 | No | |
| Stottite # | 1.728 ε | 1.738 ω | U- | .0100 | No | |
| Britholite-(Y) | 1.728 to 1.75 ε | 1.73 to 1.752 ω | U- | .0020 | No | |
| Wallkilldellite | ε | 1.728 ω | U- | No | ||
| Vanadiumdravite ! | 1.729 ε | 1.786 ω | U- | .0570 | Yes | |
| Fluorcalciobritholite ! | 1.73 ε | 1.735 ω | U- | .0050 | Yes | |
| Mixite # | 1.73 ω | 1.81 ε | U+ | .0800 | Yes | none |
| Dixenite # | 1.73 ε | 1.97 ω | U- | .2400 | No | |
| Coffinite # | 1.73 to 1.75 ε-ω | 1.73 to 1.75 ε-ω | U-+ | .0000 | No | |
| Congolite | 1.731 ε | 1.755 ω | U- | .0240 | No | |
| Magnesiotaaffeite-6N3S ! | 1.735 ε | 1.739 ω | U- | .0040 | No | |
| Sherwoodite # | 1.735 ε | 1.765 ω | U- | .0300 | No | |
| Buttgenbachite # | 1.738 ω | 1.752 ε | U+ | .0140 | Yes | |
| Arsenoflorencite-(Ce) | 1.739 ω | 1.745 ε | U+ | .0060 | No | |
| Arsenoflorencite-(Nd) * | 1.74 ω | 1.75 ε | U+ | .0100 | No | |
| Arsenoflorencite-(La) * | 1.74 ω | 1.75 ε | U+ | .0100 | No | |
| Okanoganite-(Y) | 1.74 ε | 1.753 ω | U- | .0130 | No | |
| Mongolite | 1.74 ε | 1.8 ω | U- | .0600 | No | |
| Quetzalcoatlite | 1.74 ε | 1.802 ω | U- | .0620 | No | |
| Cetineite | 1.74 ω | ε | U+ | Yes | ||
| Akdalaite | 1.741 ε | 1.747 ω | U- | .0060 | No | |
| Cerchiaraite ! | 1.745 ω | 1.765 ε | U+ | .0200 | Yes | |
| Mathewrogersite | 1.745 ε | 1.81 ω | U- | .0650 | No | |
| Florencite-(Ce) # | 1.747 ω | 1.776 ε | U+ | .0290 | No | |
| Fleischerite | 1.747 ω | 1.776 ε | U+ | .0290 | No | |
| Waylandite | 1.748 ε | 1.774 ω | U- | .0260 | No | |
| Hundholmenite-(Y) ! | 1.7487 ε | 1.7578 ω | U- | .0091 | No | |
| Gallobeudantite ! | 1.75 ε | 1.763 ω | U- | .0130 | Yes | |
| Ammoniojarosite # | 1.75 ε | 1.8 ω | U- | .0500 | No | |
| Natrojarosite # | 1.75 ε | 1.83 ω | U- | .0800 | Yes | none |
| Chadwickite ! | 1.75 ε | 1.84 ω | U- | .0900 | Yes | |
| Wallkilldellite-(Fe) ! | ε | 1.75 ω | U- | Yes | ||
| Povondraite ! | 1.751 ε | 1.82 ω | U- | .0690 | Yes | |
| Tusionite | 1.752 ε | 1.854 ω | U- | .1020 | No | |
| Zinclipscombite ! | 1.755 ω | 1.795 ε | U+ | .0400 | Yes |