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Ciprianiite

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Formula:
Ca4(Th,REE)2Al(B4Si4O22)(OH)2
System:
Monoclinic
Colour:
Brown
Lustre:
Vitreous
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.
Hellandite group mineral. REE is primarily Ce and Nd, with minor La, Pr and Sm.



Classification of Ciprianiite

Approved
Approval Year:
2001
9.DK.20

9 : SILICATES (Germanates)
D : Inosilicates
K : Inosilicates with 5-periodic single chains

Physical Properties of Ciprianiite

Vitreous
Colour:
Brown

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.
Surface Relief:
High
Dispersion:
r > v strong

Chemical Properties of Ciprianiite

IMA Formula:
Ca4(Th,REE)2Al(B4Si4O22)(OH)2
Elements listed in formula:

Crystallography of Ciprianiite

Crystal System:
Monoclinic

Type Occurrence of Ciprianiite

Relationship of Ciprianiite to other Species

9.DK.05BabingtoniteCa2Fe2+Fe3+Si5O14(OH)
9.DK.05LithiomarsturiteLiCa2Mn22+Si5O14(OH)
9.DK.05ManganbabingtoniteCa2Mn2+Fe3+Si5O14(OH)
9.DK.05MarsturiteNaCaMn32+Si5O14(OH)
9.DK.05NambuliteLiMn42+Si5O14(OH)
9.DK.05NatronambuliteNaMn42+Si5O14(OH)
9.DK.05RhodoniteMn2+SiO3
9.DK.05Scandiobabingtonite(Ca,Na)2(Fe2+,Mn)(Sc,Fe3+)Si5O14(OH)
9.DK.05FowleriteCaMn3Mn(Si5O15)
9.DK.10SantaclaraiteCaMn42+Si5O14(OH)2 · H2O
9.DK.15SaneroiteNa2(Mn2+,Mn3+)10V5+Si11O34(OH)4
9.DK.20Hellandite-(Y)(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2
9.DK.20Tadzhikite-(Ce)
9.DK.20Mottanaite-(Ce)Ca4(CeCa)AlBe2(B4Si4O22)O2
9.DK.20Hellandite-(Ce)(Ca,REE)4Ce2Al(Be,Li)2-xB4Si4O22(OH)2

Other Names for Ciprianiite

Name in Other Languages:

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.

References for Ciprianiite

Reference List:
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.

Oberti, R., Ventura, G.D., Ottolini, L., Hawthorne, F.C., Bonazzi, P. (2002) Re-definition, nomenclature, and crystal-chemistry of the hellandite group. American Mineralogist: 87: 745-752.

Grew, E.S., Anovitz, L.M. (2002) BORON: Mineralogy, Petrology and Geochemistry, second edition, 864 pages.

Mandarino, J.A. (2003) New minerals. Canadian Mineralogist: 41: 803-828.

Internet Links for Ciprianiite

mindat.org URL:
https://www.mindat.org/min-10799.html
Please feel free to link to this page.

Localities for Ciprianiite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Italy
 
  • Latium
    • Rome Province
      • Sacrofano Caldera
        • Campagnano di Roma
Chukanov N. V., Allori R. (2008): Cancrinite-group minerals from the Sacrofano caldera, Rome, Latium, Italy. Mineralogical Almanac, 13c, 20-35; Чуканов Н. В., Аллори Р. (2008): Минералы группы канкринита из кальдеры Сакрофано (Лацио, Италия). Минералогический альманах, 13c, 20-35.
    • Viterbo Province
      • Vico Lake
        • Vetralla
American Mineralogist (2002): 87: 739–744
Mineral and/or Locality  
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