Synchysite

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title: "Synchysite" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["carbonate-minerals", "monoclinic-minerals", "minerals-in-space-group-15"] topic_path: "general/carbonate-minerals" source: "https://en.wikipedia.org/wiki/Synchysite" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::data[format=table title="Infobox mineral"]

Field	Value
name	Synchysite
image	Synchysite-107154.jpg
imagesize	260
caption	A synchysite with unknown end-member composition
formula	Ca(REE)(CO3)2F
strunz	5.BD.
system	Monoclinic and trigonal
symmetry	C2/c (monoclinic)
mohs	4.5
references
::

| name = Synchysite | boxwidth = | boxbgcolor = | image = Synchysite-107154.jpg | imagesize = 260 | alt = | caption = A synchysite with unknown end-member composition | category = | formula = Ca(REE)(CO3)2F | strunz = 5.BD. | dana = | system = Monoclinic and trigonal | symmetry = C2/c (monoclinic) | unit cell = | molweight = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = 4.5 | luster = | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = Synchysite is a group of carbonate minerals. 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.

::data[format=table title="Synchesite group"]

Mineral name	Chemical formula	Symmetry	Space group
Huanghoite-(Ce)		3;2/m	R;\overline{3};m
Synchysite-(Ce)		2/m	C;2/c
Synchysite-(Nd)		2/m	C;2/c
Synchysite-(Y)		2/m	C;2/c
::

References

References

1. "Synchysite-(Ce)". handbookofmineralogy.
2. (1994). "The atomic arrangement of synchysite-(Ce), CeCaF(CO3)2". The Canadian Mineralogist.
3. "Synchysite Group".
4. "Synchysite-(Ce)".
5. "Huanghoite-(Ce)".

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