R1: Characterization and description of minerals (Joint Session with The Gemmological Society of Japan)

[R1-01] Compositional dependence of peak intensity tensor for Fe²⁺at the M1site of Ca-rich pyroxene

Daiki Fukuyama¹, *Keiji Shinoda¹, Daigo Takagi¹, Yasuhiro Kobayashi² (1. Osaka Metropolitan Univ. Sci., 2. KURNS)

Keywords:Mössbauer spectroscopy, Ca-rich pyroxene, quadrupole intensity tensor

Mössbauer spectra of thin sections of single crystal of four Ca-rich pyroxenes were measured to reveal compositional dependences of peak intensity tensor from intensity variation of quadrupole doublet. Components of the intensity tensor (I_XX, I_YY, I_XY and I_ZZ) for Fe²⁺ at M1 sites in Wo₅₀ were almost the same. Intensity tensor for Fe²⁺ at M1 sites of Wo₄₀was slightly different from the Wo₅₀. The difference of intensity tensor between Wo₅₀ and Wo₄₀ suggests that intensity tensor for Fe²⁺ at M1 sites are dependent on the Ca contents and are independent of Fe contents.