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References
- Citations
- 1 2 3 4 Nickel, Ernest H.; Nichols, Monte C., eds. (2009). "The official IMA-CNMNC List of Mineral Names" (PDF). Commission on New Minerals, Nomenclature And Classification. International Mineralogical Association . Retrieved 7 January 2012.
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi: 10.1180/mgm.2021.43 . S2CID 235729616.
- 1 2 Lovering et al. 1971, p. 40
- ↑ Lovering et al. 1971, p. 41
- ↑ Lovering et al. 1971
- 1 2 "Tranquillityite". Mindat.org. Retrieved 2010-08-07.
- ↑ "Tranquillityite". Webmineral. Retrieved 2010-08-07.
- 1 2 3 Fleischer 1973
- ↑ Handbook of Mineralogy
- 1 2 "Rare Moon mineral found in Australia". ABC News . 5 January 2012. Retrieved 15 January 2021.
- ↑ Ramdohr & El Goresy 1970
- ↑ Cameron 1970
- ↑ Dence et al. 1970 , p. 324
- ↑ Meyer, Charles (2009). "Sample 10047:Ilmenite Basalt (low K) 138 grams Figure" (PDF). NASA Lunar Sample Compendium. Nasa. Retrieved 7 January 2012.
- ↑ Heiken, Vaniman & French 1991 , pp. 133–134
- ↑ Walker, Fleischer & Buford Price 1975 , p. 505
- 1 2 3 4 Gatehouse et al. 1977
- ↑ Hinthorne et al. (1979)
- ↑ Rasmussen, Fletcher & Muhling (2008)
- ↑ Hinthorne et al. 1979 , pp. 271–303
- 1 2 Rasmussen, Fletcher & Muhling 2008
- ↑ Lunar Sample Mineralogy, NASA
- ↑ Russell et al. 2002
- ↑ Leroux & Cordier 2006
- 1 2 Rassmussen et al. 2012
- ↑ Lovering et al. 1971 , pp. 42–43
- Bibliography
- Cameron, E. N. (1970). "Opaque minerals in certain lunar rocks from Apollo 11". Proceedings of the Apollo 11 Lunar Science Conference (5–8 January 1970, Houston, TX). Geochimica et Cosmochimica Acta Supplement. 1: Mineralogy and Petrology: 193–206. Bibcode:1970GeCAS...1..221C.
- Dence, M. R.; Douglas, J. A. V.; Plant, A. G.; Traill, R. J. (1970). "Petrology, Mineralogy and Deformation of Apollo 11 Samples". Proceedings of the Apollo 11 Lunar Science Conference (5–8 January 1970, Houston, TX). Geochimica et Cosmochimica Acta Supplement. 1: Mineralogy and Petrology: 315–340. Bibcode:1970GeCAS...1..315D.
- Fleischer, Michael (1973). "New mineral names" (PDF). American Mineralogist. 58 (1–2): 139–141.
- Gatehouse, B. M.; Grey, I. E.; Lovering, J. F.; Wark, D. A. (1977). "Structural studies on tranquillityite and related synthetic phases". Proceedings of the Lunar Science Conference, 8th, Houston, Tex., March 14–18, 1977. New York: Pergamon Press, Inc. 2 (A78-41551 18–91): 1831–1838. Bibcode:1977LPSC....8.1831G.
- Heiken, Grant; Vaniman, David; French, Bevan M. (1991). Lunar Sourcebook : a User's Guide to the Moon. Cambridge: Cambridge Univ. Press. pp. 133–134. ISBN 978-0-521-33444-0 . Retrieved 7 January 2012.
- Hinthorne, J.R.; Andersen, C.A.; Conrad, R.L; Lovering, J.F. (1979). "Single-grain 207Pb/206Pb and U/Th age determinations with a 10-micron spatial resolution using the ion microprobe mass analyzer (IMMA)". Chem. Geol. 25 (4): 271–303. Bibcode:1979ChGeo..25..271H. doi:10.1016/0009-2541(79)90061-5.
- Leroux, Hugues; Cordier, Patrick (2006). "Magmatic cristobalite and quartz in the NWA 856 Martian meteorite". Meteoritics & Planetary Science. 41 (6): 913923. Bibcode:2006M&PS...41..913L. doi: 10.1111/j.1945-5100.2006.tb00495.x .
- Lovering, J. F.; Wark, D. A.; Reid, A. F.; Ware, N. G.; Keil, K.; Prinz, M.; Bunch, T.E.; El Goresy, A.; Ramdohr, P.; et al. (1971). "Tranquillityite: A new silicate mineral from Apollo 11 and Apollo 12 basaltic rocks". Proceedings of the Lunar Science Conference. 2: 39–45. Bibcode:1971LPSC....2...39L.
- Ramdohr, Paul; El Goresy, Ahmed (30 January 1970). "Opaque Minerals of the Lunar Rocks and Dust from Mare Tranquillitatis". Science. Ahmed. 167 (3918): 615–618. Bibcode:1970Sci...167..615R. doi:10.1126/science.167.3918.615. PMID 17781517. S2CID 27627972.
- Rasmussen, Birger; Fletcher, Ian R.; Muhling, Janet R. (2008). "Pb/Pb Geochronology, Petrography and Chemistry of Zr-rich Accessory Minerals (Zirconolite, Tranquillityite and Baddeleyite) in Mare Basalt 10047". Geochimica et Cosmochimica Acta. 72 (23): 5799–5818. Bibcode:2008GeCoA..72.5799R. doi:10.1016/j.gca.2008.09.010.
- Rasmussen, Birger; Fletcher, Ian R.; Gregory, Courtney J.; Muhling, Janet R.; Suvorova, Alexandra A. (2012). "Tranquillityite: The last lunar mineral comes down to Earth". Geology. 40 (1): 83–86. Bibcode:2012Geo....40...83R. doi:10.1130/G32525.1.
- Russell, Sara S.; Zipfel, Jutta; Grossman, Jeffrey N.; Grady, Monica M. (2002). "The Meteoritical Bulletin N°86 2002 July". Meteoritics & Planetary Science. 37 (S5): A157–A184. Bibcode:2002M&PS...37..157R. doi:10.1111/j.1945-5100.2002.tb00913.x. S2CID 129570004.
- Walker, Robert M.; Fleischer, Robert L.; Buford Price, P. (1975). Nuclear tracks in solids : principles and applications. Berkeley: University of California Press. p. 505. ISBN 978-0-520-02665-0 . Retrieved 7 January 2012.
Tranquillityite.
