Bonshtedtite, Sidorenkite, Aegirine (Var: Titanian Aegirine)

Specimen ID: Q66-DK4

Mineral(s)
Bonshtedtite : Na3Fe2+(CO3)(PO4)
Sidorenkite : Na3Mn2+(CO3)(PO4)
Aegirine (Var: Titanian Aegirine) : Na(Fe,Ti)Si2O6
Locality
As recorded:
Shomiokitovoe pegmatite, Umbozero mine, Alluaiv Mt, Lovozersky District, Murmansk Oblast, Russia
Mindat locality:
Events

Photo added to mindat.org

SEM image. Short-prismatic crystals with cores of manganoan Bonshtedtite of composition Na3(Fe0.62Mn0.38)1.00[CO3][PO4] are covered by thin outer zones of ferroan Sidorenkite - Na3(Mn0.68Fe0.32)1.00[CO3][PO4]. Associating mineral is prismatic titanoan Aegirine (Na0.97Ca0.03)1.00(Fe3+0.79Ti0.09Fe2+0.08Mn2+0.04)1.00[Si2O6] with TiO2 content ~3 mas.%. Analytical data are available on daughter photos. Collected by Marco Sturla in 2006 (specimen #1). Pavel M. Kartashov analytical data, collection and photo.
Pavel Kartashov - 4th October 2011

Photo added to mindat.org

Analytical data for Bonshtedtite from cores of crystals from previous photo. Note that the analysis is distorted, because of it was obtained from unpolished grain surface not perpendicular to electron beam. But it can be recalculated on approximate empirical formula Na3(Fe0.62Mn0.38)1.00[CO3][PO4]. Collected by Marco Sturla in 2006 (specimen #1). Pavel M. Kartashov analytical data, collection and photo.
Pavel Kartashov - 4th October 2011

Photo added to mindat.org

Analytical data for Sidorenkite from outer zones of crystals from previous photo. Note that the analysis is distorted, because of it was obtained from unpolished grain surface not perpendicular to electron beam. But it can be recalculated on approximate empirical formula Na3(Mn0.68Fe0.32)1.00[CO3][PO4]. Collected by Marco Sturla in 2006 (specimen #1). Pavel M. Kartashov analytical data, collection and photo.
Pavel Kartashov - 4th October 2011
Liked by
No-one has added this to their favourites.
Log in to comment/edit
4,957,034 minIDs have been issued as of 11th Dec 2019 3:09 am UTC