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Ferri-mottanaite-(Ce)

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About Ferri-mottanaite-(Ce)Hide

Formula:
Ca4Ce2Fe3+(Be1.50.5)[Si4B4O22]O2
Crystal System:
Monoclinic
Name:
Named after its relation to mottanaite-(Ce).
The first Fe3+-dominant hellandite Group mineral.


Classification of Ferri-mottanaite-(Ce)Hide

Approved
Approval Year:
2018
First Published:
2019

Optical Data of Ferri-mottanaite-(Ce)Hide

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.
Surface Relief:
High

Chemical Properties of Ferri-mottanaite-(Ce)Hide

Formula:
Ca4Ce2Fe3+(Be1.50.5)[Si4B4O22]O2
IMA Formula:
Ca4Ce2Fe3+(Be1.50.5)[Si4B4O22]O2

Crystallography of Ferri-mottanaite-(Ce)Hide

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)°
Ratio:
a:b:c = 4.014 : 1 : 2.161
Unit Cell V:
866.58 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.745Å(33)
3.453Å(36)
3.246Å(43)
3.086Å(44)
2.919Å(44)
2.857Å(50)
2.648Å(100)
1.904Å(48)

Type Occurrence of Ferri-mottanaite-(Ce)Hide

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+0.540.13)Σ2.00Z(Fe3+0.50Al0.23Mn3+0.17Ti4+0.17)TΣ1.07(Be1.04Li0.040.92)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)Hide

Relationship of Ferri-mottanaite-(Ce) to other SpeciesHide

Other Members of this group:
CiprianiiteCa4[(Th,U),Ca]Σ2Al(Be0.5☐1.5)Σ2[B4Si4O22](OH)2Mon.
Hellandite-(Ce)(Ca,REE)4Ce2Al□2(B4Si4O22) (OH)2Mon. 2/m
Hellandite-(Y)(Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2Mon.
Mottanaite-(Ce)Ca4(Ce,REE)Σ2Al(Be1.5☐0.5)Σ2[B4Si4O22]O2Mon. 2/m
Tadzhikite-(Ce)Ca4Ce3+2Ti◻(B4Si4O22)(OH)2Mon.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ferri-mottanaite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Oberti, R., Langone, A., Boiocchi, M., Hawthorne, F.C. and Bernabè, E. (2018) Ferri-mottanaite-(Ce), IMA 2017-087a. CNMNC Newsletter No. 46, December 2018, page xxxx; Mineralogical Magazine, 82, xxxx–xxxx.
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 https://doi.org/10.1127/ejm/2019/0031-2858

Internet Links for Ferri-mottanaite-(Ce)Hide

Localities for Ferri-mottanaite-(Ce)Hide

ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Italy (TL)
 
  • Lazio
    • Viterbo Province
Oberti, R., Langone, A., Boiocchi, M., Hawthorne, F.C. and Bernabè, E. (2018) Ferri-mottanaite-(Ce), IMA 2017-087a. CNMNC Newsletter No. 46, December 2018, page xxxx; Mineralogical Magazine, 82: xxxx–xxxx.; 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
 
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