Crystal Lab › The 230 space groups › Monoclinic
No. 15 C 1 2/c 1
Monoclinic space group · 8 symmetry operations per cell · 6 Wyckoff positions · 18 settings
Symmetry elements and Wyckoff positions (interactive)
No. 15 C 1 2/c 1
SettingLoading the group…
x = 0.10, y = 0.17, z = 0.08
- Number
- 15
- Hermann–Mauguin symbol
- C 1 2/c 1
- Hall symbol
-C 2yc- Crystal system
- Monoclinic
- Operations per cell
- 8
- General position
- 8f (site symmetry 1)
Wyckoff positions (standard setting)
| Multiplicity | Letter | Site symmetry |
|---|---|---|
| 8 | f | 1 |
| 4 | e | 2 |
| 4 | d | -1 |
| 4 | c | -1 |
| 4 | b | -1 |
| 4 | a | -1 |
How to read it
- Each symmetry element drawn in the cell is worked out from the group’s operations: rotation and screw axes as lines (arrow = direction; dashed = screw), mirror and glide planes as sheets (dashed outline = glide), inversion centres as dots; rotoinversion axes are dotted. Colours: 2-fold red, 3-fold green, 4-fold blue, 6-fold purple.
- The multiplicity is how many equivalent points an atom on that site generates in the conventional cell; the general position has the highest multiplicity, equal to the number of operations.
- Site symmetry is the point group that leaves that position fixed; a special position (lower multiplicity) sits on a symmetry element — press + on a row to see its atoms land on the drawn elements.
Prototype structures in this group (75)
C₂H₂N₂OS₂Ag₂O₂PbCu₂Mo₃O₁₂Rb₂Gd₂Mo₃O₁₂(H₂O)₂Na₂O₉Si₃ZrNa₂O₃PrBeHNaO₈Si₃Li₂O₄WH₂O₄SCl₂Ni₅O₁₂Te₄B₂Pd₅Nb₂O₅In₂Te₅Nb₂O₆SnAl₃H₂KO₁₂Si₃ S51C₂H₂O₅Rb₂Fe₂MnNaO₁₂P₃H₂LiNPdP₂Br₂PdC₂ThCu₂SeO₂SbF₂SnO₂SiCd₃H₁₆O₂₀S₃ H420(H₂O)_{1.86}Mg₂O₅(OH)Si₂Co₃Lu₂Si₅B₃Ni₄Mg₃O₅(OH)₄Si₂ S55Ba₃CoIr₂O₉Cs₃GeTe₃Ag₃AsS₃Cl₄SSm₂O₄OsS₄VO₅V₃O₅SiY₂Na₃O₁₂PSi₂Zr₂Cu₆Sn₅O₇V₂Zn₂Fe₇S₈H₈K4₂MnO₁₂S₂MoO₁₁P₃SiCLi₂O₃CuNa₂O₇P₂AgS₂SbIrSrO₃ClH₃CrCuP₂S₆BaC₄(H₂O)₄N₄Ni H422CaH₄O₆S H46AlO₄PCrP₄KBrCu₅O₂(PO₄)₂NiSe₅Ta₂AlHO₆Si₂ S56CaO₅SiTi S06STa₆BaMnNa₂O₈V₄FeKS₂ F5aFeLiO₂AgAsS₂CoGeO₃CaFeO₆Si₂CaMgO₆Si₂ S41FeLiO₈W₂AuSbTeNSeNaSiCuO B26CrSHGaF₂