Synchysite Explained

Synchysite
Formula:	Ca(REE)(CO₃)₂F
Strunz:	5.BD.
System:	Monoclinic and trigonal
Symmetry:	C2/c (monoclinic)
Mohs:	4.5
References:	^[1] ^[2]

Synchysite is a group of carbonate minerals.^[3] 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.^[4] ^[5]

Synchesite group
scope=col	Mineral name	scope=col	Chemical formula	scope=col	Symmetry	scope=col	Space group
		3 2/m	R \overline{3} m
		2/m	C 2/c
		2/m	C 2/c
		2/m	C 2/c

Notes and References

Web site: Synchysite-(Ce). handbookofmineralogy. 24 February 2013.
Wang . L. . Ni . Y. . Hughes . J.M. . Bayliss . P. . Drexler . J.W. . The Canadian Mineralogist . 32 . 1994 . 865–871 . The atomic arrangement of synchysite-(Ce), CeCaF(CO3)2 . 30 December 2020.
Web site: Synchysite Group. 24 February 2013.
Web site: Synchysite-(Ce). 24 February 2013.
Web site: Huanghoite-(Ce). 24 February 2013.