Maoniupingite-(Ce) (Maoniupingit-(Ce)) |
Collectors Summary
Color |
schwarz oder braunschwarz |
Lustre |
Halbmetallglanz, Pechglanz |
Crystal System |
monoklin, C2/m |
Chemism
Chemical formula |
(REE,Ca)4(Fe3+,Ti,Fe2+,☐)(Ti,Fe3+,Fe2+,Nb)4Si
4O22
|
Additional chem. information |
Fe-dominantes Analog von Polyakovit-(Ce)
|
Chemical composition |
Calcium, Eisen, Niob, Silicium, Titan, Sauerstoff, Vakanz, REE
|
Unit weight: 1200.3087064005 u; Number of atoms in the formula: 35 |
Info
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Empirical formula: |
(REE0.75Ca0.25)4(Fe0.55Ti0.3Fe0.1Vc0.05)(Ti0.55Fe0.3Fe0.1Nb0.05)4Si
4O22 |
Element |
Symbol |
Weight% |
Atoms |
Atoms% |
Atom weight (u) |
Sum weight (u) |
Vacancy |
Vc |
0.00 |
0.05 |
0.14 |
0.0000000 |
0.0000000 |
Oxygen |
O |
29.32 |
22 |
62.86 |
15.9994300 |
351.9874600 |
Silicon |
Si |
9.36 |
4 |
11.43 |
28.0855300 |
112.3421200 |
Calcium |
Ca |
3.34 |
1 |
2.86 |
40.0784000 |
40.0784000 |
Titanium |
Ti |
9.97 |
2.5 |
7.14 |
47.8671000 |
119.6677500 |
Iron |
Fe |
10.47 |
2.25 |
6.43 |
55.8452000 |
125.6517000 |
Niobium |
Nb |
1.55 |
0.2 |
0.57 |
92.9063820 |
18.5812764 |
Rare Earth |
REE |
35.99 |
3 |
8.57 |
144.0000000 |
432.0000000 |
|
Strunz 9th edition incl. updates |
9.BE.70 |
|
9: Silikate (Germanate) B: Gruppensilikate (Sorosilikate) E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination 70:Chevkinit-Gruppe |
Lapis Classification |
VIII/C.17-023 |
|
VIII: SILIKATE C: Gruppensilikate 17: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F); Chevkinit-Reihe |
Classification by Hölzel |
9.BK.155 |
|
9: SILICATES B: Sorosilicates K: Perrierite-Group |
Dana 8th edition |
56.02.08.08 |
|
56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O 02: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with cations in [4] and/or >[4] coordination 08: Perierite - Chevkinite group |
IMA status |
anerkannt 2003
|
Mineral status |
anerkanntes Mineral
|
IMA Classification
Optical Properties
Color |
schwarz oder braunschwarz
|
Change in color |
grau in reflektiertem Licht
|
Diaphaneity (Transparency) |
opak
|
Lustre |
Halbmetallglanz, Pechglanz
|
max. Birefringence |
0.033
|
|
 Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness. |
RI value α / ω / n |
1.937
|
RI value γ / ε |
1.970
|
Ri mean |
1.955
|
2V angle |
Biaxial (-) nd
|
Pleochroism |
schwach
|
Anisotropism |
stark
|
Reflectivity: (Lambda nm) ↓, ↑, Ø |
(470) 12.5, 14.6, 13.6
(546) 12.1, 14.4, 13.3
(589) 12.1, 14.3, 13.2
(650) 11.2, 13.7, 12.5
|
|
 |
Reflectivity Ø |
13.11
|
Crystallography
Crystal System |
monoklin
|
Class (H-M) |
2/m
|
Space Group number |
12
|
Space Group |
C2/m
|
Cell parameters a (Å) |
13.385
|
Cell parameters b (Å) |
5.742
|
Cell parameters c (Å) |
11.059
|
Cell parameters a/b or c/a |
2.331
|
Cell parameters c/b |
1.926
|
Cell parameters α |
90°
|
Cell parameters β |
100.60
|
Cell parameters γ |
90°
|
Z |
2
|
Volume (ų) |
835.454
|
X-Ray Powder Diffraction |
4.89(35), 3.490(40), 3.189(80), 3.004(40), 2.874(40), 2.760(40), 2.722(100)
|
|
 Calculated from d-spacing and intensity at 0.1541838 nm (Cu) |
Crystal Structure 3D
Physical Properties
Preface
Author (Name, Year) |
Shen & Yang & Xu, 2005
|
References
Chenji yu Tetisi Dizhi 25 (2005), 210
European Journal of Mineralogy 14 (2002), 969
R. Macdonald, B. Bagiński, P. M. Kartashov, D. Zozulya and P. Dzierżanowski - Chevkinite-group minerals from Russia and Mongolia: new compositional data from metasomatites and ore deposits - Mineralogical Magazine, June 2012, Vol. 76(3), pp. 535–549 
|
IMA group assignments
(Ce,La,Ca,Na,Th)4(Fe2+,Mg)2(Ti,Fe3+)3Si4O22 monoklin C2/m Ce4Mg(Fe3+,W)3☐(Si2O7)2O6(OH)2 monoklin C2/m (Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe3+)2Ti2Si4O22 monoklin P21/a (REE,Ca)4(Fe3+,Ti,Fe2+,☐)(Ti,Fe3+,Fe2+,Nb)4Si
4O22 monoklin C2/m (Ce,La,Nd,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2[O4|Si2O7]2 |
Refresh list | Actuality: 10. Feb 2025 - 18:21:25 |
Other languages
German |
Maoniupingit-(Ce) |
|
English |
Maoniupingite-(Ce) |
|
Alternative Name
Simplified Chinese |
牦牛坪矿-(Ce) |
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Simplified Chinese |
牦牛坪矿-(Ce) |
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CNMNC (IMA)-Number
CNMNC symbol
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