Gaudefroyite (Ca4Mn3+2.5(BO3)3(CO3)O2.25(OH)0.75)
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Figure 3406 shows the EELS profile of Ca in mineral gaudefroyite (Ca4Mn3+2.5(BO3)3(CO3)O2.25(OH)0.75) exhibits two intense white-line features because of the Ca L2,3 core-loss edge, arising from transitions from the 2p core level. The EXELFS (extended energy loss fine structure) modulations are very weak and is only visible on the tail of the edge.

EELS profile of the Ca L2,3 core-loss edge

Figure 3406. EELS profile of the Ca L2,3 core-loss edge, arising from
Ca elements in mineral gaudefroyite (Ca4Mn3+2.5(BO3)3(CO3)O2.25(OH)0.75).

 

 

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