Zaisho - a pallasite containing pyroxene and phosphoran olivine.

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 Fa_18.3. Zaisho also contains stanfieldite and a phosphate with a composition between that of stanfieldite and farringtonite.-R.A.H.