This Japanese meteorite, one of only four known pallasite falls, contains pyroxene (rare in pallasites) and is only the fourth meteorite known to contain olivine with appreciable P (P2O5 0.03-4.36%); it also contains the rare Mg phosphate, farringtonite. The olivines have P in tetrahedral sites and vacancies (for charge balance) in octahedral sites; the average olivine composition is Fa18.3. Zaisho also contains stanfieldite and a phosphate with a composition between that of stanfieldite and farringtonite.-R.A.H.
ASJC Scopus subject areas
- Geochemistry and Petrology