Feldspar polymorphs
Hollandite-type NaAlSi3O8
Mineral name: lingunite (named after Lin-gun Liu)
Discovery: Sixiangkou meteorite (L6), Tenham meteorite (L6)
A fine-grained aggregate of lingunite in the Y-75100 chondrite.
*References*
Gillet P., Chen M., Dubrovinsky L., and El Goresy A. 2000. Science 287:1633–1636. (First discovery)
Tomioka N., Mori H., and Fujino K. 2000. Geophysical Research Letters 27:3997–4000. (Discovery)
Liu L. and El Goresy, A. 2007. International Geology Review 49:854–860. (Described as a new mineral species)
Liu L. 1978. Earth and Planetary Science Letters 37:438–444. (First synthesis)
Agarwal A., Reznik B., Kontny A., Heissler S., and Schilling F. 2016. Scientific Reports 6:doi:10.1038/srep25991. (Discovery in a terrestrial impact structure)
Hollandite-type KAlSi3O8
Mineral name: liebermannite (named after Robert C. Liebermann)
Discovery: Zagami meteorite (shergottite)
*References*
Ringwood A. E., Reid A. F., and Wadsley A. D. 1967. Acta Crystallographica 23:1093–1095. (First synthesis)
Langenhorst F. and Poirier J.P. 2000. Earth and Planetary Science Letters, 176, 259–265. (Discovery)
Ma C., Tschauner O. D., Beckett J. R., Rossman G. R., Prescher C., Parakapenka V. B., Bechtel H. A., and McDowell A. 2018. Meteoritics & Planetary Science 53:50–61. (Described as a new mineral species)
Hollandite-type CaAl2Si2O8
Mineral name: stöfflerite (named after Dieter Stöffler)
Discovery: NWA 856 (shergottite)
*References*
Tschauner O., Ma C., Spray J.G., Greenberg E., and Prakapenka V.B. 2021. American Mineralogist, 106, 650–655. (Described as a new mineral species)