Fluorcarmoite-(BaNa)
A valid IMA mineral species
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About Fluorcarmoite-(BaNa)
Formula:
(Ba◻)(NaNa)Ca(Na2◻)Mg13Al(PO4)11(PO3OH)F2
Colour:
yellow–orange
Lustre:
Vitreous
Crystal System:
Monoclinic
Member of:
Name:
The root-name is after Monte Carmo di Loano, the highest peak in the area, namesake of the tectonic unit where the mineral was found and the first locality where phosphate mineralization has been found in the region. The fluoro-prefix indicates dominance of F over OH, and the suffix indicates the dominant cations, according to nomenclature for the arrojadite group.
Unique Identifiers
Mindat ID:
46826
Long-form identifier:
mindat:1:1:46826:4
IMA Classification of Fluorcarmoite-(BaNa)
Approved
IMA Formula:
Ba◻Na2Na2◻CaMg13Al(PO4)11(PO3OH)F2
Approval year:
2015
First published:
2019
Type description reference:
Classification of Fluorcarmoite-(BaNa)
8.BF.05
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
F : With medium-sized and large cations, (OH, etc.):RO4< 0.5:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
F : With medium-sized and large cations, (OH, etc.):RO4< 0.5:1
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 for Standard |
|---|---|---|
| Fcm-BaNa | 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 Fluorcarmoite-(BaNa)
Vitreous
Transparency:
Translucent
Colour:
Yellow–orange
Streak:
Yellow–orange
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
None observed
Optical Data of Fluorcarmoite-(BaNa)
Type:
Biaxial (-)
RI values:
nα = 1.6240(5) nβ = 1.6255(5) nγ = 1.6384(5)
2V:
Measured: 35° (2), Calculated: 37.9°
Max. Birefringence:
δ = 0.014
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Pleochroism:
Weak
Comments:
Light yellow
Chemistry of Fluorcarmoite-(BaNa)
Mindat Formula:
(Ba◻)(NaNa)Ca(Na2◻)Mg13Al(PO4)11(PO3OH)F2
Element Weights:
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| Na2O | 5.83 % |
| K2O | 0.36 % |
| CaO | 2.64 % |
| SrO | 0.46 % |
| BaO | 7.12 % |
| MnO | 2.01 % |
| FeO | 17.68 % |
| MgO | 15.12 % |
| Al2O3 | 2.57 % |
| P2O5 | 44.96 % |
| F | 2.14 % |
| –O = F2 | -0.90 % |
| H2Ocalc | 0.33 % |
| Total: | 100.32 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Na3.77Ca0.94Ba0.93K0.15Sr0.09?0.12)Σ=6.00(Mg7.52Fe2+4.93Mn2+0.57?)Σ=13.02Al1.01(PO4)11(PO3)(OH0.74F0.26)F2 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Maremola Creek, Isallo, Magliolo, Savona Province, Liguria, Italy | wt%, wavelength-dispersive-mode electron microprobe. The empirical formula calculated on the basis of 50 O + F + (OH) atoms per formula unit. |
Crystallography of Fluorcarmoite-(BaNa)
Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Setting:
Cc
Cell Parameters:
a = 16.4013(3) Å, b = 9.9487(1) Å, c = 24.4536(8) Å
β = 105.725(2)°
β = 105.725(2)°
Ratio:
a:b:c = 1.649 : 1 : 2.458
Unit Cell V:
3,840.80 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.959 Å | (25) |
| 4.570 Å | (24) |
| 3.188 Å | (28) |
| 3.012 Å | (100) |
| 2.818 Å | (28) |
| 2.735 Å | (32) |
| 2.682 Å | (39) |
| 2.526 Å | (25) |
Reference:
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Fluorcarmoite-(BaNa)
Place of Conservation of Type Material:
Type material is deposited in the collections of the Museo Regionale di Scienze Naturali, Sezione di Mineralogia, Petrografia e Geologia, via Giovanni Giolitti 36, I-10123 Torino, Italy, catalogue number M/15940
Geological Setting of Type Material:
Found in a pebble of the riverbed of the upper Maremola Creek, Liguria, Italy.
Associated Minerals at Type Locality:
Reference:
Synonyms of Fluorcarmoite-(BaNa)
Other Language Names for Fluorcarmoite-(BaNa)
Dutch:Fluorcarmoiet-(BaNa)
German:Fluorcarmoit-(BaNa)
Relationship of Fluorcarmoite-(BaNa) to other Species
Member of:
Other Members of Arrojadite Group:
| Arrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. 2/m : B2/b |
| Arrojadite-(KFe) | (KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| 'Arrojadite-(KFeNa)' | (KNa)(Fe2+◻)Ca(Na2Na)Fe2+13Al(PO4)11(PO4)(OH)2 | |
| Arrojadite-(KNa) | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| 'Arrojadite-(NaFe)' | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | |
| Arrojadite-(PbFe) | (Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| Arrojadite-(SrFe) | (Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| Dickinsonite-(KMnNa) | (KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2 | Mon. 2/m : B2/b |
| 'Ferri-arrojadite-(BaNa)' | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Fe3+(PO4)11(PO3OH)(OH)2 | |
| Fluorarrojadite-(BaFe) | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | Mon. m : Bb |
| Fluorarrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | Mon. m : Bb |
| 'Fluorarrojadite-(KNa)' | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | |
| 'Fluorarrojadite-(NaFe)' | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | |
| Manganoarrojadite-(KNa) | (KNa)(NaNa)Mn2+(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
| Sigismundite | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
Common Associates
Related Minerals - Strunz-mindat Grouping
| 8.BF. | Manganoarrojadite-(KNa) | (KNa)(NaNa)Mn2+(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF. | Sigismundite | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Dickinsonite-(KMnNa) | (KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2 |
| 8.BF.05 | Arrojadite-(KNa) | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Fluorarrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 |
| 8.BF.05 | Arrojadite-(KFe) | (KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Arrojadite-(PbFe) | (Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Fluorarrojadite-(BaFe) | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 |
| 8.BF.05 | 'Unnamed (Ba-dominant member of dickinsonite group)' | |
| 8.BF.05 | 'Unnamed (Pb-dominant member of dickinsonite group)' | |
| 8.BF.05 | Arrojadite-(SrFe) | (Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | 'Arrojadite-(NaFe)' | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | Arrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | 'Arrojadite-(KFeNa)' | (KNa)(Fe2+◻)Ca(Na2Na)Fe2+13Al(PO4)11(PO4)(OH)2 |
| 8.BF.05 | 'Ferri-arrojadite-(BaNa)' | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Fe3+(PO4)11(PO3OH)(OH)2 |
| 8.BF.05 | 'Fluorarrojadite-(KNa)' | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 |
| 8.BF.05 | 'Fluorarrojadite-(NaFe)' | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 |
| 8.BF.10 | Samuelsonite | (Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2 |
| 8.BF.15 | Griphite | Na4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8 |
| 8.BF.20 | Nabiasite | BaMn9(VO4)6(OH)2 |
| 8.BF.25 | Starovaite | KCu5O(VO4)3 |
| 8.BF.30 | Achyrophanite | (K,Na)3(Fe3+,Ti,Al,Mg)5O2(AsO4)5 |
| 8.BF.35 | Cryptochalcite | K2Cu5O(SO4)5 |
| 8.BF.35 | Cesiodymite | CsKCu5O(SO4)5 |
Fluorescence of Fluorcarmoite-(BaNa)
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.
Internet Links for Fluorcarmoite-(BaNa)
mindat.org URL:
https://www.mindat.org/min-46826.html
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References for Fluorcarmoite-(BaNa)
Reference List:
Chopin, Christian, Oberti, Roberta, Cámara, Fernando (2006) The arrojadite enigma: II. Compositional space, new members, and nomenclature of the group. American Mineralogist, 91 (8). 1260-1270 doi:10.2138/am.2006.2190
Hålenius, U.; Hatert, F.; Pasero, M.; Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015. Mineralogical Magazine, 79 (5). p.1223-1230. doi:10.1180/minmag.2015.079.5.16
Localities for Fluorcarmoite-(BaNa)
Showing 1 localities.
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 (TL) | |
| Bracco et al. (2016) +1 other reference |
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Maremola Creek, Isallo, Magliolo, Savona Province, Liguria, Italy