Macfallite Johnsenite-(Ce) Braunite-I Image

Braunite-I, Macfallite, Johnsenite-(Ce)

Mineral:

Braunite-I: Mn++Mn+++6SiO12
Macfallite: Ca2(Mn+++,Al)3(SiO4)(Si2O7)(OH)3
Johnsenite-(Ce): Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(CO3)(OH,Cl)2

Comments:

Tiny - less than 1mm - maroon crystals of mcfallite suspended as inclusions in massive quartz along with larger spots of brown johnsenite-(Ce) and braunite.

Location:

Artur mine, Jaguaracu, Minas Gerais, Brazil.

Scale:

Overall 3 x 2.5 slab.

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