Ciprianiite
A valid IMA mineral species
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About Ciprianiite
Curzio Cipriani
Formula:
Ca4[(Th,U),Ca]Σ2Al(Be0.5◻1.5)Σ2[B4Si4O22](OH)2
Formerly Ca4[(Th,U)(REE)]Al◻2(Si4B4O22)(OH,F)2; changed due to approval of the IMA 18-D proposal
Colour:
Brown
Lustre:
Vitreous
Crystal System:
Monoclinic
Member of:
Name:
Named by G. Della Ventura, P. Bonazzi, R. Oberti, and L. Ottolini in 2002 in honor of Curzio Cipriani (26 November 1927, Florence, Italy - 6 December 2007, Florence, Italy), Professor of Mineralogy and Head of the Museum of Mineralogy (later the Musuem of Natural History), at the University of Florence, for his contribution to mineral systematics. He was on the Commission of Museums of the International Mineralogical Association for more than twenty years and he founded the journal Museologia Scientifica.
Type Locality:
Hellandite group mineral. REE is primarily Ce and Nd, with minor La, Pr and Sm.
First mineral to combine Th and B as essential components (the second is UM1995-43-SiO:BTh).
First mineral to combine Th and B as essential components (the second is UM1995-43-SiO:BTh).
Unique Identifiers
Mindat ID:
10799
Long-form identifier:
mindat:1:1:10799:2
GUID
(UUID V4):
(UUID V4):
2cac9674-ea2b-40c4-9f22-92f9cf2403ce
IMA Classification of Ciprianiite
Approved
IMA Formula:
Ca4(ThCa)Al(Be0.5◻1.5)Σ2[B4Si4O22](OH)2
Approval year:
2001
Classification of Ciprianiite
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 |
|---|---|---|
| Cip | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ciprianiite
Vitreous
Transparency:
Transparent
Colour:
Brown
Streak:
white
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
Fair-good on {100}
Fair-good on {100}
Fracture:
Conchoidal
Optical Data of Ciprianiite
Type:
Biaxial (-)
RI values:
nα = 1.680 nβ = 1.694 nγ = 1.708
Max Birefringence:
δ = 0.028
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
Dispersion:
r > v strong
Chemistry of Ciprianiite
Mindat Formula:
Ca4[(Th,U),Ca]Σ2Al(Be0.5◻1.5)Σ2[B4Si4O22](OH)2
Formerly Ca4[(Th,U)(REE)]Al◻2(Si4B4O22)(OH,F)2; changed due to approval of the IMA 18-D proposal
Formerly Ca4[(Th,U)(REE)]Al◻2(Si4B4O22)(OH,F)2; changed due to approval of the IMA 18-D proposal
Crystallography of Ciprianiite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Setting:
P2/a
Cell Parameters:
a = 19.059(5) Å, b = 4.729(1) Å, c = 10.291(4) Å
β = 111.33(2)°
β = 111.33(2)°
Ratio:
a:b:c = 4.03 : 1 : 2.176
Unit Cell V:
863.99 ų (Calculated from Unit Cell)
Z:
2
Twinning:
Frequent on {100}
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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CIF File Best | x | y | z | a | b | c
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Rotation
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0002819 | Ciprianiite | Della Ventura G, Bonazzi P, Oberti R, Ottolini L (2002) Ciprianiite and mottanaite-(Ce), two new minerals of the hellandite group from Latium (Italy) American Mineralogist 87 739-744 |  | 2002 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.846 Å | (100) |
| 3.089 Å | (86) |
| 2.634 Å | (84) |
| 2.653 Å | (80) |
| 3.454 Å | (79) |
| 2.648 Å | (79) |
| 2.911 Å | (74) |
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 Ciprianiite
General Appearance of Type Material:
Tabular crystals
Place of Conservation of Type Material:
Natural History Museum, the University of Florence, Italy (2771/RI).
Geological Setting of Type Material:
miarolitic cavities and voids in alkali-syenitic pyroclastic ejecta
Associated Minerals at Type Locality:
Reference:
Della Ventura, G., Bonazzi, P., Oberti, R., Ottolini, L. (2002) Ciprianiite and mottanaite-(Ce), two new minerals of the hellandite group from Latium (Italy). American Mineralogist: 87: 739-744
Synonyms of Ciprianiite
Other Language Names for Ciprianiite
Relationship of Ciprianiite to other Species
Member of:
Other Members of this group:
| Ferri-hellandite-(Ce) | (Ca3Ce)Ce2Fe3+◻2B4Si4O22(OH)2 | Mon. 2/m : P2/b |
| Ferri-mottanaite-(Ce) | Ca4Ce2Fe3+(Be1.5◻0.5)[Si4B4O22]O2 | Mon. 2/m : P2/b |
| Hellandite-(Ce) | (Ca,REE)4Ce2Al◻2(B4Si4O22) (OH)2 | Mon. 2/m |
| Hellandite-(Y) | (Ca,REE)4Y2Al◻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+2Ti◻2(B4Si4O22)(OH)2 | Mon. 2/m : P2/b |
Common Associates
Associated Minerals Based on Photo Data:
| 6 photos of Ciprianiite associated with Sanidine | K(AlSi3O8) |
| 2 photos of Ciprianiite associated with Magnetite | Fe2+Fe3+2O4 |
| 2 photos of Ciprianiite associated with Danburite | CaB2Si2O8 |
| 1 photo of Ciprianiite associated with Hellandite | |
| 1 photo of Ciprianiite associated with Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| 1 photo of Ciprianiite associated with Vonsenite | Fe2+2Fe3+(BO3)O2 |
Related Minerals - Strunz-mindat Grouping
| 9.DK. | Ferrorhodonite | CaMn3Fe[Si5O15] |
| 9.DK. | Vittinkiite | MnMn3Mn[Si5O15] |
| 9.DK. | Ferri-hellandite-(Ce) | (Ca3Ce)Ce2Fe3+◻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)4Y2Al◻2(B4Si4O22) (OH)2 |
| 9.DK.20 | Tadzhikite-(Ce) | Ca4Ce3+2Ti◻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 | Hellandite-(Ce) | (Ca,REE)4Ce2Al◻2(B4Si4O22) (OH)2 |
| 9.DK.20 | Ferri-mottanaite-(Ce) | Ca4Ce2Fe3+(Be1.5◻0.5)[Si4B4O22]O2 |
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 Ciprianiite
mindat.org URL:
https://www.mindat.org/min-10799.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Ciprianiite
Reference List:
Oberti, Roberta, Ventura, Giancarlo Della, Ottolini, Luisa, Hawthorne, Frank C., Bonazzi, Paola (2002) Re-definition, nomenclature and crystal-chemistry of the hellandite group. American Mineralogist, 87 (5) 745-752 doi:10.2138/am-2002-5-618
Localities for Ciprianiite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - 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).
All localities listed without proper references should be considered as questionable.
Italy | |
| Chukanov N. V. (2008) +1 other reference |
| American Mineralogist (2002) |
| Carlini et al. (2017) |
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Sacrofano, Metropolitan City of Rome Capital, Lazio, Italy