Cámaraite
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Fernando Cámara
Formula:
Ba3Na(Fe2+,Mn)8Ti4(Si2O7)4O4(OH,F)7
Colour:
Orange-red to brownish-red
Lustre:
Vitreous
Specific Gravity:
3.871
Crystal System:
Triclinic
Member of:
Name:
Named by E. Sokolova, Y. Abdu, F.C. Hawthorne, A.V. Stepanov, B.K. Bekenova, P.E. Kotel'nikov in 2009 in honor of Fernando Cámara (24 May 1967, Melilla, Spain - ) mineralogist, crystallographer, and professor at the University of Milan. He has a special interest in Ti-silicate minerals, amphiboles, and arrojadite- and cancrinite-group minerals.
Classification of Cámaraite
Physical Properties of Cámaraite
Vitreous
Transparency:
Translucent
Colour:
Orange-red to brownish-red
Comment:
Paler than bafertisite
Streak:
Pale yellow
Comment:
<5 (less than bafertisite)
Tenacity:
Brittle
Cleavage:
Perfect
{001}
{001}
Parting:
None observed
Density:
3.871 g/cm3 (Measured) 4.018 g/cm3 (Calculated)
Comment:
Measured is less than calculated because of intergrowths
Optical Data of Cámaraite
Type:
Biaxial (+)
Pleochroism:
Strong
Comments:
X = light brown, Y = reddish-brown, Z = yellow-brown, with Z < X < Y
Chemical Properties of Cámaraite
Formula:
Ba3Na(Fe2+,Mn)8Ti4(Si2O7)4O4(OH,F)7
IMA Formula:
Ba3NaFe2+8Ti4(Si2O7)4O4(OH)4F3
Crystallography of Cámaraite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Cell Parameters:
a = 10.6965(7) Å, b = 21.478(2) Å, c = 21.478(2) Å
α = 99.345(1)°, β = 92.315(2)°, γ = 89.993(2)°
α = 99.345(1)°, β = 92.315(2)°, γ = 89.993(2)°
Ratio:
a:b:c = 0.498 : 1 : 1
Unit Cell V:
4,864.78 ų (Calculated from Unit Cell)
Twinning:
None observed
Comment:
Non-standard space group C-1.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.825 Å | (30) |
| 3.394 Å | (50) |
| 3.182 Å | (50) |
| 2.869 Å | (40) |
| 2.788 Å | (90) |
| 2.629 Å | (100) |
| 2.101 Å | (50) |
| 1.721 Å | (70) |
Type Occurrence of Cámaraite
General Appearance of Type Material:
Platey crystals to 15x8mm and star-shaped aggregates of crystals with different
orientations, on fracture surfaces as intergrowths with jinshajiangite and bafertisite.
orientations, on fracture surfaces as intergrowths with jinshajiangite and bafertisite.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia (catalog no. 3828/1 and 3
828/2).
828/2).
Associated Minerals at Type Locality:
Synonyms of Cámaraite
Relationship of Cámaraite to other Species
Member of:
Other Members of this group:
| Bafertisite | Ba2Fe2+4Ti2(Si2O7)2O2(OH)2F2 | Tric. |
| Bobshannonite | Na2KBa(Mn,Na)8(Nb,Ti)4(Si2O7)4O4(OH)4(O,F)2 | Tric. |
| Bussenite | Na2Ba2Fe2+Ti(Si2O7)(CO3)(OH)3F | Tric. 1 : P1 |
| Hejtmanite | Ba2(Mn2+,Fe2+)4Ti2(Si2O7)2O2(OH)2F2 | Tric. 1 |
| Jinshajiangite | BaNaFe2+4Ti2(Si2O7)2O2(OH)2F | Tric. 1 : P1 |
| Perraultite | BaNaMn2+4Ti2(Si2O7)2O2(OH)2F | Mon. 2/m : B2/m |
| Surkhobite | NaCaBa2Mn8Ti4(Si2O7)4O5F5 | Mon. 2 : B2 |
| Yoshimuraite | Ba2Mn2Ti(Si2O7)(PO4)O(OH) | Tric. 1 : P1 |
Fluorescence of Cámaraite
None
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 Cámaraite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Williams, P.A., Hatert, F., Pasero, M. (2009) New minerals approved in 2009. in International Mineralogical Association, 1-34.
Sokolova, E., Abdu, Y., Hawthorne, F.C., Stepanov, A.V., Bekenova, G.K., Kotel'nikov, P.E. (2009) Cámaraite, Ba3NaTi4(Fe2+,Mn)8(Si2O7)4O4(OH,F)7. I. A new Ti-silicate mineral from the Verkhnee Espe Deposit, Akjailyautas Mountains, Kazakhstan. Mineralogical Magazine: 73: 847-854.
Cámara, F., Sokolova, E., Nieto, F. (2009) Cámaraite, Ba3NaTi4(Fe2+,Mn)8(Si2O7)4O4(OH,F)7. II. The crystal structure and crystal chemistry of a new group-II Ti-disilicate mineral. Mineralogical Magazine: 73: 855-870.
Piilonen, P.C., Poirier, G. (2010) New mineral names. American Mineralogist: 95: 1357-1361.
Sokolova, E. & Camara, F. (2017): The seidozerite supergroup of TS-block minerals: nomenclature and classification, with change of the following names: rinkite to rinkite-(Ce), mosandrite to mosandrite-(Ce), hainite to hainite-(Y) and innelite-1T to innelite-1A. Mineralogical Magazine: 81: 1457–1484
Internet Links for Cámaraite
mindat.org URL:
https://www.mindat.org/min-39451.html
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Localities for Cámaraite
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The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - 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).
All localities listed without proper references should be considered as questionable.
Kazakhstan (TL) | |
| IMA Approvals - May 2009 Sokolova, E., Y. Abdu, F.C. Hawthorne, A.V. Stepanov, G.K. Bekenova, and P.E. Kotel’nikov (2009) Cámaraite, Ba3NaTi4(Fe2+,Mn)8(Si2O7)4O4(OH,F)7. I. A new Ti-silicate mineral from the Verkhnee Espe Deposit, Akjailyautas Mountains, Kazakhstan. Mineralogical Magazine, 73, 847–854.; Sokolova, E., Abdu, Y., Hawthorne, F. C., Stepanov, A. V., Bekenova, G. K., & Kotel’nikov, P. E. (2009). Camaraite, Ba3NaTi4 (Fe2+, Mn) 8 (Si2O7) 4O4 (OH, F) 7. I. A new Ti-silicate mineral from the Verkhnee Espe Deposit, Akjailyautas Mountains, Kazakhstan. |