Reidite Explained
| Reidite |
| Category: | Zircon group |
| Boxbgcolor: | - 7da7d9
|
| Formula: | ZrSiO4 |
| Imasymbol: | Rei[1] |
| Molweight: | 183.31 g/mol |
| Strunz: | 9.AD.45 |
| System: | Tetragonal |
| Class: | Dipyramidal (4/m)
H-M symbol: (4/m) |
| Symmetry: | I41/a |
| Unit Cell: | a = 4.738, c = 10.506 [Å], Z = 4 |
| Color: | Colorless to white |
| Habit: | Epitaxial - crystallographic alignment with a precursor mineral,occurs as inclusions in other minerals. |
| Cleavage: | None |
| Fracture: | Irregular/uneven |
| Tenacity: | Brittle |
| Mohs: | 7.5 |
| Luster: | Adamantine |
| Refractive: | nω=1.64, nε=1.655 |
| Opticalprop: | Uniaxial (+) |
| Birefringence: | 0.0150 |
| Pleochroism: | None |
| Streak: | White |
| Gravity: | 5.16 |
| Diaphaneity: | Translucent |
| References: | [2] [3] |
Reidite is a rare polymorph of ZrSiO4 created when zircon experiences high pressure and temperature. Reidite is denser than zircon and has the same crystal structure as scheelite. All natural occurrences of reidite are associated with meteorite impact events.
On Earth, reidite has been reported from ten impact structures: the Chesapeake Bay Crater in Virginia; Ries Crater in Germany; Xiuyan Crater in China; Woodleigh Crater in Western Australia;[4] Rock Elm Crater in Wisconsin;[5] Dhala Crater in India;[6] Stac Fada in Scotland; Haughton in Canada; Steen River in Canada, and Rochechouart in France. Reidite has also been found in one lunar meteorite.[7]
Name origin and discovery
Reidite is named after Alan F. Reid, the scientist who first synthesized it during high-pressure experiments in the laboratory in 1969.[8]
Reidite was first discovered in natural samples by B.P. Glass and Shaobin Liu in 2001.[9]
Occurrence
Reidite is formed from zircon above ~30GPa in shock recovery experiments. However, the temperatures generated during meteorite impacts are much higher, and reidite can be formed down to ~9GPa under natural impact conditions.[10] Reidite has been found in lamellar, granular, and dendritic forms within host zircon, typically making up less than 10% of the grain. Reidite from Rochechouart impact structure has also been reported as bladed, wedged, and massive.[11]
Libyan desert glass may show lattice deformation in zircon that is interpreted as evidence of this material having previously contained reidite, and as such constitutes strong evidence for its impact origin.[12]
Related silica minerals
9.AD.25 | Ca3Cr2(SiO4)3 |
| 9.AD.25 | Wadalite | (Ca,Mg)6(Al,Fe3+)4((Si,Al)O4)3O4Cl3 |
| 9.AD.25 | Holtstamite | Ca3(Al,Mn3+)2(SiO4)2(OH)4 |
| 9.AD.25 | Kerimasite | Ca3Zr2(SiO4)(Fe3+O4)2 |
| 9.AD.25 | Toturite | Ca3Sn2(SiO4)(Fe3+O4)2 |
| 9.AD.25 | Momoiite | (Mn2+,Ca)3V23+(SiO4)3 |
| 9.AD.25 | Eltyubyuite | Ca12Fe103+Si4O32Cl6 |
| 9.AD.25 | Hutcheonite | Ca3Ti2(SiAl2)O12 |
| 9.AD.30 | | (U4+,Th)(SiO4)1-x(OH)4x |
| 9.AD.30 | | HfSiO4 |
| 9.AD.30 | | (Th,U)SiO4 |
| 9.AD.30 | | ZrSiO4 |
| 9.AD.30 | Stetindite | Ce4+SiO4 |
| 9.AD.35 | | ThSiO4 |
| 9.AD.35 | Tombarthite-(Y) | Y4(Si,H4)4O12−x(OH)4+2x |
| 9.AD.40 | | Bi4(SiO4)3 | |
See also
References
- Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3 . 291–320. 10.1180/mgm.2021.43 . 2021MinM...85..291W . 235729616 . free.
- Web site: Reidite. mindat.org. Hudson Institute of Mineralogy. 18 March 2015.
- Web site: Reidite Mineral Data. Webmineral.com. 18 March 2015.
- https://www.abc.net.au/news/2018-10-16/rare-mineral-reidite-found-in-woodleigh-meteorite-crater-in-wa/10382888 Discovery of reidite, one of the rarest minerals on Earth, may reveal Australia's biggest crater
- Web site: Oskin. Becky. Rare Mineral Discovered in Ancient Meteorite Impact Crater. Livescience.com. 3 November 2014. Livescience. 24 March 2015.
- Li. Shan-Shan. Keerthy. S.. Santosh. M.. Singh. S.P.. Deering. C.D.. Satyanarayanan. M.. Praveen. M.N.. Aneeshkumar. V.. Indu. G.K.. Anatomy of impactites and shocked zircon grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central India. Gondwana Research. 54. 81–101 . February 2018 . 10.1016/j.gr.2017.10.006. 2018GondR..54...81L.
- Xing . Weifan . Lin . Yangting . Zhang . Chi . Zhang . Mingming . Hu . Sen . Hofmann . Beda A. . Sekine . Toshimori . Xiao . Long . Gu . Lixin . 2020-11-16 . Discovery of Reidite in the Lunar Meteorite Sayh al Uhaymir 169 . Geophysical Research Letters . en . 47 . 21 . 10.1029/2020GL089583 . 2020GeoRL..4789583X . 226337486 . 0094-8276.
- Reid . A. F. . Ringwood . A. E. . 1969-06-01 . Newly observed high pressure transformations in Mn3O4, CaAl2O4, and ZrSiO4 . Earth and Planetary Science Letters . en . 6 . 3 . 205–208 . 10.1016/0012-821X(69)90091-0 . 0012-821X.
- Glass . B.P. . Liu . Shaobin . 2001-04-01 . Discovery of high-pressure ZrSiO4 polymorph in naturally occurring shock-metamorphosed zircons . Geology . 29 . 4 . 371–373 . 10.1130/0091-7613(2001)029<0371:DOHPZP>2.0.CO;2 . 0091-7613.
- Timms . Nicholas E. . Erickson . Timmons M. . Pearce . Mark A. . Cavosie . Aaron J. . Schmieder . Martin . Tohver . Eric . Reddy . Steven M. . Zanetti . Michael R. . Nemchin . Alexander A. . Wittmann . Axel . 2017-02-01 . A pressure-temperature phase diagram for zircon at extreme conditions . Earth-Science Reviews . en . 165 . 185–202 . 10.1016/j.earscirev.2016.12.008 . 0012-8252. free . 2017ESRv..165..185T .
- Plan . Anders . Kenny . Gavin G. . Erickson . Timmons M. . Lindgren . Paula . Alwmark . Carl . Holm-Alwmark . Sanna . Lambert . Philippe . Scherstén . Anders . Söderlund . Ulf . Osinski . Gordon . October 2021 . Exceptional preservation of reidite in the Rochechouart impact structure, France: New insights into shock deformation and phase transition of zircon . Meteoritics & Planetary Science . en . 56 . 10 . 1795–1828 . 10.1111/maps.13723 . 238711754 . 1086-9379. free . 2021M&PS...56.1795P .
- Web site: Cavosie . Aaron J. . How we solved the mystery of Libyan desert glass . 2019-10-12 . The Conversation . 22 May 2019 . en.
External links
