.... Raman spectra using different excitation wavelengths allowed identification of mineral phases such as olivine, wadsleyite, ringwoodite, high-Ca clinopyroxene, majorite-pyrope, jadeite, maskelynite, and lingunite. Olivine is Fe depleted in contact with the ringwoodite, which suggests chemical...

... to the rutile structure ( Bystrøm and Bystrøm 1950 ; Post and Burnham 1986 ; Hyde and Anderson 1989 ). NaAlSi 3 O 8 -hollandite and KAlSi 3 O 8 -hollandite have been reported previously as minerals with the names lingunite ( Gillet et al. 2000 ) and liebermannite ( Ma et al. 2018 ), respectively. Recently...

...Fig. 2. A back-scattered electron image of a shock-induced melt vein containing a diopside + ringwoodite fragment. Ol: olivine; Ri: ringwoodite; Di: diopside; Pyx: pyroxene; Ak: akimotoite; Jd: jadeite; Chr: chromite; Mj: majorite; Mj-Py: majorite-pyrope; Msk: maskelynite; Lng: lingunite. ...

...-pressure polymorph of albite joining lingunite, which is NaAlSi 3 O 8 in the hollandite-type structure and it forms under similar conditions ( Gillet et al. 2000 ). Under static high pressures, these phases may only exist in the form of minor components in jadeite, but in terrestrial impactites...

..., sodic plagioclase may transform into a variety of high-pressure (HP) forms, including hollandite-structured lingunite ( Gillet et al. 2000 ; Baziotis et al. 2013 ; Kubo et al. 2017 ), amorphous maskelynite, jadeite plus a silica phase, or the recently discovered albitic jadeite ( Ma et al. 2022...

... at solid-state transformation (SST) of albite; LAb, albite melt; LOl, olivine melt; Lng, lingunite; Ol, olivine; Opx, orthopyroxene; Qz, quartz; Rwd, ringwoodite, Sti, stishovite; Lng, lingunite; Ol, olivine; Opx, orthopyroxene; Qz, quartz; Rwd, ringwoodite; Sti, stishovite. ...

... of albite, jadeite, and nepheline . Earth and Planetary Science Letters , 37 , 438 – 444 . Liu L. El Goresy A. ( 2007 ) High-pressure phase transitions of the feldspars, and further characterization of lingunite . International Geology Review , 49 , 854 – 860 . Németh P...

... and Mason 1970 ) coexisting with ringwoodite. Majorite has been described in many shocked chondrites along with other high-pressure minerals, such as wadsleyite, ringwoodite, akimotoite, MgSiO 3 -perovskite (bridgmanite), magnesiowüstite, lingunite, etc. ( Price et al. 1979 ; Chen et al. 1996 ; Kimura et...

... phases (lingunite), akaogiite (a high-pressure polymorph of TiO2), and a polymorph of graphite. El Goresy and his coworkers also observed solid-state transformations of olivine to wadsleyite and ringwoodite; the decomposition of olivine; and the growth of wadsleyite, ringwoodite, and majorite from melts...

... various polymorphs is fundamental for the understanding of crustal processes ( Krivovichev 2020 ). Albite, the sodium end-member of feldspar that includes “low,” “high,” and “mono” forms ( Krivovichev 2020 ), has two polymorphs newly approved this century, namely lingunite ( Liu and El Gorsey 2007...