 |
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 |
| Oftedalite ! | 1.553 ε | 1.556 ω | U- | .0030 | Yes | |
| Formicaite ! | 1.553 ω | 1.573 ε | U+ | .0200 | No | |
| Diomignite | 1.554 ε | 1.612 ω | U- | .0580 | No | |
| Aliettite | 1.556 | 1.567 | U | .0110 | No | |
| Julienite * | 1.556 ω | 1.645 ε | U+ | .0890 | No | |
| Silvialite ! | 1.558 ε | 1.585 ω | U- | .0270 | No | |
| Reyerite # | 1.558 to 1.563 ε | 1.558 to 1.563 ω | U- | .0000 | No | |
| Zincowoodwardite-1T ! | 1.558 | U | No | |||
| Almarudite ! | 1.559 ε | 1.56 ω | U- | .0010 | Yes | |
| Sodium-autunite # | 1.559 ε | 1.578 ω | U- | .0190 | No | |
| Sodium meta-autunite ! | 1.559 ε | 1.578 ω | U- | .0190 | No | |
| Ferrinatrite # | 1.559 ω | 1.627 ε | U+ | .0680 | No | |
| Merrihueite | 1.559 to 1.592 ε | 1.57 ω | U- | .0110 | No | |
| Barium-zinc-alumopharmacosiderite * | 1.56 ε | 1.572 ω | U- | .0120 | No | |
| Meta-ankoleite | 1.56 ε | 1.58 ω | U- | .0200 | No | |
| Brucite # | 1.56 ω | 1.58 ε | U+ | .0200 | No | |
| Zeophyllite # | 1.56 to 1.569 ε | 1.565 to 1.577 ω | U- | .0050 to .0080 | No | anomalously biaxial |
| Yoshiokaite | 1.56 to 1.58 ω | 1.62 to 1.64 ε | U+ | .0600 | No | |
| Coalingite | 1.56 to 1.59 ε | 1.588 to 1.635 ω | U- | .0280 to .0450 | No | |
| Nikischerite ! | ε | 1.56 ω | U- | Yes | ||
| Shibkovite ! | 1.561 ω | 1.563 ε | U+ | .0020 | Yes | |
| Zincowoodwardite-3R ! | ε | 1.5636 ω | U- | No | ||
| Cesanite | 1.564 ε | 1.57 ω | U- | .0060 | No | |
| Perhamite | 1.564 ω | 1.577 ε | U+ | .0130 | No | |
| Beryl # | 1.564 to 1.595 ε | 1.568 to 1.602 ω | U- | .0040 to .0070 | Yes | none |
| Pinnoite # | 1.565 ω | 1.575 ε | U+ | .0100 | No | |
| Zhonghuacerite-(Ce) | 1.565 ε | 1.745 ω | U- | .1800 | No | |
| Brannockite | 1.566 ε | 1.567 ω | U- | .0010 | Yes | |
| Chernikovite | 1.568 ε | 1.579 ω | U- | .0110 | Yes | |
| Ekanite | 1.568 ε | 1.58 ω | U- | .0120 | No | |
| Natroalunite # | 1.568 ω | 1.59 ε | U+ | .0220 | No | |
| Brandholzite ! | 1.569 ε | 1.57 ω | U- | .0010 | No | |
| Aqualite ! | 1.569 ω | 1.571 ε | U+ | .0020 | No | |
| Schaurteite | 1.569 ω | 1.581 ε | U+ | .0120 | No | |
| Bariopharmacosiderite | 1.57 ε-ω | 1.57 ε-ω | U-+ | .0000 | No | |
| Shafranovskite | 1.57 ε | 1.587 ω | U- | .0170 | Yes | |
| Abernathyite # | 1.57 ε | 1.597 ω | U- | .0270 | Yes | |
| Caresite | 1.57 ε | 1.599 ω | U- | .0290 | Yes | |
| Siderite # | 1.57 to 1.633 ε | 1.785 to 1.875 ω | U- | .2150 to .2420 | No | |
| Sergeevite | 1.571 | 1.581 | U | .0100 | No | |
| Steacyite | 1.572 ε | 1.573 ω | U- | .0010 | No | |
| Godovikovite | 1.572 ω | 1.581 ε | U+ | .0090 | No | |
| Alunite # | 1.572 ω | 1.592 ε | U+ | .0200 | No | none |
| Ewaldite | 1.572 ε | 1.646 ω | U- | .0740 | Yes | |
| Tunisite | 1.573 ω | 1.599 ε | U+ | .0260 | No | |
| Heinrichite # | 1.573 ε | 1.605 ω | U- | .0320 | Yes | |
| Metavoltine # | 1.573 to 1.581 ε | 1.588 to 1.595 ω | U- | .0150 | Yes | |
| Ekaterinite | 1.574 ε | 1.577 ω | U- | .0030 | No | |
| Tuliokite | 1.574 ω | 1.587 ε | U+ | .0130 | No | |
| Chayesite | 1.575 ω | 1.578 ε | U+ | .0030 | No | |
| Darapiosite | 1.575 ε | 1.58 ω | U- | .0050 | No | |
| Dmisteinbergite | 1.575 ω | 1.58 ε | U+ | .0050 | No | |
| Lawrencite # | 1.576 ε | 1.576 ω | U- | .0000 | No | |
| Zeunerite # | 1.576 to 1.623 ε | 1.585 to 1.643 ω | U- | .0090 to .0200 | Yes | none |
| Arctite | 1.577 ε | 1.578 ω | U- | .0010 | No | |
| Kafehydrocyanite * | 1.577 ω | 1.584 ε | U+ | .0070 | No | |
| Sugilite | 1.577 to 1.607 ε | 1.579 to 1.611 ω | U- | .0020 to .0040 | Yes | |
| Namuwite | 1.577 | U | No | |||
| Sazykinaite-(Y) | 1.578 ε | 1.585 ω | U- | .0070 | Yes | |
| Sabieite | 1.578 ω | 1.595 ε | U+ | .0170 | No | |
| Cacoxenite # | 1.58 to 1.585 ω | 1.64 to 1.65 ε | U+ | .0600 to .0650 | Yes | none |
| Leisingite ! | 1.581 ε | 1.803 ω | U- | .2220 | Yes | |
| Malinkoite ! | 1.582 ε | 1.591 ω | U- | .0090 | No | |
| Torbernite # | 1.582 ε | 1.592 ω | U- | .0100 | Yes | none |
| Piypite | 1.583 ω | 1.695 ε | U+ | .1120 | Yes | |
| Bystrite | 1.584 ω | 1.66 ε | U+ | .0760 | Yes | |
| Meta-autunite # | 1.584 to 1.596 ε | 1.604 to 1.607 ω | U- | .0200 | No | |
| Iraqite-(La) | 1.585 ε | 1.59 ω | U- | .0050 | No | |
| Machatschkiite | 1.585 ε | 1.593 ω | U- | .0080 | No | |
| Natrouranospinite # | 1.585 ε | 1.612 ω | U- | .0270 | No | |
| Trogerite # | 1.585 ε | 1.63 ω | U- | .0450 | No | anomalously biaxial |
| Trattnerite ! | 1.586 ε | 1.589 ω | U- | .0030 | Yes | |
| Abenakiite-(Ce) | 1.586 ε | 1.589 ω | U- | .0030 | Yes | |
| Pertlikite ! | 1.586 ε | 1.59 ω | U- | .0040 | No | |
| Dusmatovite | 1.586 ε | 1.59 ω | U- | .0040 | Yes | |
| Tungusite | ε | 1.586 ω | U- | No | ||
| Walthierite | 1.588 ω | 1.604 ε | U+ | .0160 | No | |
| Blatonite ! | 1.588 ω | 1.612 ε | U+ | .0240 | Yes | |
| Phosphoellenbergerite ! | 1.588 to 1.589 ε | 1.606 to 1.609 ω | U- | .0180 to .0200 | Yes | |
| Rinneite # | 1.5886 ω | 1.5894 ε | U+ | .0008 | No | |
| Wenkite | 1.589 ε | 1.596 ω | U- | .0070 | No | |
| Chlormanganokalite # | 1.59 ω | 1.59 ε | U+ | .0000 | No | |
| Ammonioalunite | 1.59 ω | 1.602 ε | U+ | .0120 | No | |
| Wesselsite ! | 1.59 ε | 1.63 ω | U- | .0400 | No | |
| Hydrohonessite | 1.59 ε | 1.63 ω | U- | .0400 | No | |
| Cuprorivaite # | 1.59 ε | 1.633 ω | U- | .0430 | No | |
| Chloromagnesite * | 1.59 ε | 1.675 ω | U- | .0850 | No | |
| Zirsinalite | 1.59 to 1.592 ε | 1.624 ω | U- | .0340 | No | |
| Tisinalite | 1.59 to 1.592 ε | 1.624 ω | U- | .0340 | No | |
| Wardite # | 1.59 to 1.597 ω | 1.599 to 1.607 ε | U+ | .0090 to .0100 | No | |
| Meliphanite # | 1.592 to 1.672 ε | 1.611 to 1.664 ω | U- | .0190 | Yes | |
| Effenbergerite | 1.593 ε | 1.633 ω | U- | .0400 | Yes | |
| Kampfite ! | 1.594 ε | 1.642 ω | U- | .0480 | Yes | |
| Karnasurtite-(Ce) | 1.595 ε | 1.617 ω | U- | .0220 | No | |
| Metanovacekite # | 1.595 ε | 1.632 ω | U- | .0370 | No | |
| Jaffeite | 1.596 ω | 1.604 ε | U+ | .0080 | No | |
| Alarsite ! | 1.596 ω | 1.608 ε | U+ | .0120 | Yes | |
| Hilairite | 1.596 ε | 1.609 ω | U- | .0130 | No | |
| Rhodochrosite # | 1.596 to 1.598 ε | 1.814 to 1.816 ω | U- | .2180 | No | none |
| Holtedahlite | 1.597 ε | 1.599 ω | U- | .0020 | No |