Synchysite

A synchysite with unknown end-member composition.

Synchysite is a group of carbonate minerals.^[1] The three isostructural chemical end members are Synchysite-(Ce), Synchysite-(Nd) and Synchysite-(Y). Huanghoite-(Ce) belongs to the group, but has a different symmetry and calcium is replaced by barium.^[2][3]

Synchesite group

Mineral name	Chemical formula	Symmetry	Space group
Huanghoite-(Ce)	BaCe(CO 3) 2F	$3\;2/m$	$R\;\overline{3}\;m$
Synchysite-(Ce)	Ca(Ce,La)(CO 3) 2F	$2/m$	$C\;2/c$
Synchysite-(Nd)	CaNd(CO 3) 2F	$2/m$	$C\;2/c$
Synchysite-(Y)	CaY(CO 3) 2F	$2/m$	$C\;2/c$

References

1. "Synchysite Group". Retrieved 24 February 2013.
2. "Synchysite-(Ce)". Retrieved 24 February 2013.
3. "Huanghoite-(Ce)". Retrieved 24 February 2013.