Fig. 6From: Formation mechanisms of ringwoodite: clues from the Martian meteorite Northwest Africa 8705TEM–EDS elemental mapping images of Mg, Fe, and Ca of polycrystalline ringwoodite and matrix (Mtx). a–c Elemental mapping images of Fe, Mg, and Ca for polycrystalline ringwoodite in Fig. 5b show the homogeneous composition distribution. d–f Elemental mapping images of Fe, Mg, and Ca in the matrix from white dotted-line box in Fig. 5d shows that the distributions of Fe, Mg, and Ca are heterogeneous. Between the ringwoodite and wadsleyite, there exists Ca-rich interstitial materialBack to article page