Ferri-mottanaite-(Ce)
A valid IMA mineral species
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About Ferri-mottanaite-(Ce)
Formula:
Ca4Ce2Fe3+(Be1.5â—»0.5)[Si4B4O22]O2
Crystal System:
Monoclinic
Member of:
Name:
Named after its relation to mottanaite-(Ce).
The first Fe3+-dominant hellandite Group mineral.
Unique Identifiers
Mindat ID:
53254
Long-form identifier:
mindat:1:1:53254:1
GUID
(UUID V4):
(UUID V4):
d1492cf8-7cbf-48ae-817f-3ee4e6d9d5db
IMA Classification of Ferri-mottanaite-(Ce)
Approved
IMA Formula:
Ca4Ce2Fe3+(Be1.5â—»0.5)[Si4B4O22]O2
Approval year:
2018
First published:
2019
Classification of Ferri-mottanaite-(Ce)
9.DK.20
9 : SILICATES (Germanates)
D : Inosilicates
K : Inosilicates with 5-periodic single chains
9 : SILICATES (Germanates)
D : Inosilicates
K : Inosilicates with 5-periodic single chains
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Fmot-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Optical Data of Ferri-mottanaite-(Ce)
Type:
Biaxial (-)
RI values:
nα = 1.748(5) nβ = 1.748(5) nγ = 1.773(5)
2V:
Measured: 1.773° (5), Calculated: 82.5°
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Chemistry of Ferri-mottanaite-(Ce)
Mindat Formula:
Ca4Ce2Fe3+(Be1.5â—»0.5)[Si4B4O22]O2
Crystallography of Ferri-mottanaite-(Ce)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Setting:
P2/a
Cell Parameters:
a = 19.0548(9) Å, b = 4.7468(2) Å, c = 10.2560(5) Å
β = 110.906(2)°
β = 110.906(2)°
Ratio:
a:b:c = 4.014 : 1 : 2.161
Unit Cell V:
866.58 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.745 Ã… | (33) |
| 3.453 Ã… | (36) |
| 3.246 Ã… | (43) |
| 3.086 Ã… | (44) |
| 2.919 Ã… | (44) |
| 2.857 Ã… | (50) |
| 2.648 Ã… | (100) |
| 1.904 Ã… | (48) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Ferri-mottanaite-(Ce)
Place of Conservation of Type Material:
Collections of the Museo di Mineralogia, Dipartimento di Scienze della Terra e dell'Ambiente, Università di Pavia, catalogue number 2018-02.
Empirical Formula of Type Material:
X(Ca)Y4(Ca0.40REE0.93(Th,U)4+0.54◻0.13)Σ2.00 Z(Fe3+0.50Al0.23Mn3+0.17Ti4+0.17)TΣ1.07(Be1.04Li0.04◻0.92)Σ2.00[Si4.03B3.89O22] (O1.09(OH)0.38F0.53)Σ2.00
Reference:
Oberti, R.,Langone, A., Boiocchi, M., Bernabè, E. & Hawthorne, F. C (2019) News from the hellandite group: the redefinition of mottanaite and ciprianiite and the new mineral description of ferri-mottanaite-(Ce), the first Fe3+-dominant hellandite. European Journal of Mineralogy, 31(4): 799-806
Synonyms of Ferri-mottanaite-(Ce)
Relationship of Ferri-mottanaite-(Ce) to other Species
Member of:
Other Members of this group:
| Ciprianiite | Ca4[(Th,U),Ca]Σ2Al(Be0.5◻1.5)Σ2[B4Si4O22](OH)2 | Mon. 2/m : P2/b |
| Ferri-hellandite-(Ce) | (Ca3Ce)Ce2Fe3+â—»2B4Si4O22(OH)2 | Mon. 2/m : P2/b |
| Hellandite-(Ce) | (Ca,REE)4Ce2Alâ—»2(B4Si4O22) (OH)2 | Mon. 2/m |
| Hellandite-(Y) | (Ca,REE)4Y2Alâ—»2(B4Si4O22) (OH)2 | Mon. 2/m : P2/b |
| Mottanaite-(Ce) | Ca4(Ce,REE)Σ2Al(Be1.5◻0.5)Σ2[B4Si4O22]O2 | Mon. 2/m |
| Tadzhikite-(Ce) | Ca4Ce3+2Tiâ—»2(B4Si4O22)(OH)2 | Mon. 2/m : P2/b |
Related Minerals - Strunz-mindat Grouping
| 9.DK. | Ferrorhodonite | CaMn3Fe[Si5O15] |
| 9.DK. | Vittinkiite | MnMn3Mn[Si5O15] |
| 9.DK. | Ferri-hellandite-(Ce) | (Ca3Ce)Ce2Fe3+â—»2B4Si4O22(OH)2 |
| 9.DK. | Shijiangshanite | Pb3CaAl(Si5O14)(OH)3 · 3H2O |
| 9.DK.05 | Allagite | |
| 9.DK.05 | Babingtonite | Ca2(Fe,Mn)FeSi5O14(OH) |
| 9.DK.05 | Lithiomarsturite | LiCaMn3Si5O14(OH) |
| 9.DK.05 | Manganbabingtonite | Ca2(Mn,Fe)FeSi5O14(OH) |
| 9.DK.05 | Marsturite | NaCaMn3Si5O14(OH) |
| 9.DK.05 | Nambulite | LiMn2+4Si5O14(OH) |
| 9.DK.05 | Natronambulite | (Na,Li)(Mn,Ca)4Si5O14OH |
| 9.DK.05 | Rhodonite | CaMn3Mn[Si5O15] |
| 9.DK.05 | Scandiobabingtonite | Ca2(Fe2+,Mn)ScSi5O14(OH) |
| 9.DK.10 | Santaclaraite | CaMn4[Si5O14OH](OH) · H2O |
| 9.DK.15 | Saneroite | NaMn2+5[Si5O14(OH)](VO3)(OH) |
| 9.DK.20 | Hellandite-(Y) | (Ca,REE)4Y2Alâ—»2(B4Si4O22) (OH)2 |
| 9.DK.20 | Tadzhikite-(Ce) | Ca4Ce3+2Tiâ—»2(B4Si4O22)(OH)2 |
| 9.DK.20 | Hellandite-(Yb) | (Ca,Y)4(Yb,Y)2(Al,Fe3+,Ti4+)(Be,Li)2[B4Si4O22](O,F,OH)2 |
| 9.DK.20 | Mottanaite-(Ce) | Ca4(Ce,REE)Σ2Al(Be1.5◻0.5)Σ2[B4Si4O22]O2 |
| 9.DK.20 | Ciprianiite | Ca4[(Th,U),Ca]Σ2Al(Be0.5◻1.5)Σ2[B4Si4O22](OH)2 |
| 9.DK.20 | Hellandite-(Ce) | (Ca,REE)4Ce2Alâ—»2(B4Si4O22) (OH)2 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Ferri-mottanaite-(Ce)
mindat.org URL:
https://www.mindat.org/min-53254.html
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References for Ferri-mottanaite-(Ce)
Localities for Ferri-mottanaite-(Ce)
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Italy (TL) | |
| HÃ¥lenius et al. (2018) +1 other reference |
Vico volcanic complex, Viterbo Province, Lazio, Italy