Barbosalite
A valid IMA mineral species - grandfathered
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About Barbosalite
Aluízio Licínio de Miranda Barbosa
Formula:
Fe2+Fe3+2(PO4)2(OH)2
Colour:
Black to dark blue-green, green, blue green, green blue, greenish black, black
Lustre:
Vitreous, Sub-Vitreous, Resinous, Waxy, Greasy, Dull
Hardness:
5½ - 6
Specific Gravity:
3.60 - 3.62
Crystal System:
Monoclinic
Member of:
Name:
Named by Marie Louise Lindberg (Smith) and William T. Pecora in 1955 in honor of Brazilian geologist Aluízio Licínio de Miranda Barbosa [July 3, 1916 Alto Rio Doce, Minas Gerais, Brasil - September 23, 2013 Brazil], emeritus professor of geology of the School of Mines at Oro Preto, Minas Gerais, Brasil.
Dimorph of:
Unique Identifiers
Mindat ID:
516
Long-form identifier:
mindat:1:1:516:2
IMA Classification of Barbosalite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1954
Classification of Barbosalite
8.BB.40
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
Dana 7th ed.:
41.10.1.4
41.10.1.4
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : (AB)3(XO4)2Zq
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : (AB)3(XO4)2Zq
19.13.1
19 : Phosphates
13 : Phosphates of Fe alone
19 : Phosphates
13 : Phosphates of Fe alone
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Bsa | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Bbs | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Barbosalite
Vitreous, Sub-Vitreous, Resinous, Waxy, Greasy, Dull
Transparency:
Translucent, Opaque
Colour:
Black to dark blue-green, green, blue green, green blue, greenish black, black
Streak:
Dark blue to dark green
Hardness:
5½ - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal, Sub-Conchoidal
Density:
3.60 - 3.62 g/cm3 (Measured) 3.72 g/cm3 (Calculated)
Optical Data of Barbosalite
Type:
Biaxial (+)
RI values:
nα = 1.76 - 1.78 nβ = 1.77 - 1.81 nγ = 1.835 - 1.84
2V:
Measured: 64° to 70°
Birefringence:
0.075
Max. Birefringence:
δ = 0.060 - 0.075
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:
Very 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.
Dispersion:
r > v strong
Pleochroism:
Visible
Comments:
X = Y = dark blue green; Z = dark olive green.
Comments:
Absorption: X = Y > Z.
Chemistry of Barbosalite
Mindat Formula:
Fe2+Fe3+2(PO4)2(OH)2
Element Weights:
Elements listed:
Crystallography of Barbosalite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 7.31 Å, b = 7.48 Å, c = 7.52 Å
β = 120.15°
β = 120.15°
Ratio:
a:b:c = 0.977 : 1 : 1.005
Unit Cell V:
349.94 ų
Z:
2
Morphology:
Blocky to rectangular prismatic crystal, also botryoidal.
Twinning:
Contact twins with (001) as composition surface.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0008413 | Barbosalite | Redhammer G J, Tippelt G, Roth G, Lottermoser W, Amthauer G (2000) Structure and Mossbauer spectroscopy of barbosalite Fe2+Fe3+2(PO4)2(OH)2 between 80 K and 300 K Physics and Chemistry of Minerals 27 419-429 | 2000 | 0 | 293 | ||
| 0008412 | Barbosalite | Redhammer G J, Tippelt G, Roth G, Lottermoser W, Amthauer G (2000) Structure and Mossbauer spectroscopy of barbosalite Fe2+Fe3+2(PO4)2(OH)2 between 80 K and 300 K Physics and Chemistry of Minerals 27 419-429 | 2000 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.84 Å | (60) |
| 3.361 Å | (100) |
| 3.313 Å | (80) |
| 3.239 Å | (60) |
| 3.160 Å | (60) |
| 2.327 Å | (40) |
| 1.309 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Barbosalite
General Appearance of Type Material:
Black drusy crystals.
Place of Conservation of Type Material:
National Museum, Rio de Janeiro, Brazil.
The Natural History Museum, London, England, 1965,209.
National Museum of Natural History, Washington, D.C., USA, 106842.
The Natural History Museum, London, England, 1965,209.
National Museum of Natural History, Washington, D.C., USA, 106842.
Geological Setting of Type Material:
Granite pegmatite.
Associated Minerals at Type Locality:
Synonyms of Barbosalite
Other Language Names for Barbosalite
Relationship of Barbosalite to other Species
Member of:
Other Members of Lazulite Group:
| Hentschelite | CuFe3+2(PO4)2(OH)2 | Mon. 2/m : P21/m |
| Lazulite | MgAl2(PO4)2(OH)2 | Mon. 2/m : P21/b |
| Meizhouite | Fe2+V3+2(PO4)2(OH)2 | Mon. 2/m : P21/b |
| Scorzalite | Fe2+Al2(PO4)2(OH)2 | Mon. 2/m : P21/b |
| Wilhelmkleinite | ZnFe3+2(AsO4)2(OH)2 | Mon. 2/m : P21/m |
Common Associates
Associations Based on Photo Data:
| 51 photos of Barbosalite associated with Hureaulite | Mn2+5(PO3OH)2(PO4)2 · 4H2O |
| 36 photos of Barbosalite associated with Phosphosiderite | FePO4 · 2H2O |
| 21 photos of Barbosalite associated with Pyrite | FeS2 |
| 19 photos of Barbosalite associated with Tavorite | LiFe3+(PO4)(OH) |
| 19 photos of Barbosalite associated with Strengite | FePO4 · 2H2O |
| 11 photos of Barbosalite associated with Rockbridgeite | (Fe2+0.5Fe3+0.5)2Fe3+3(PO4)3(OH)5 |
| 3 photos of Barbosalite associated with Triplite | Mn2+2(PO4)F |
| 3 photos of Barbosalite associated with Leucophosphite | KFe3+2(PO4)2(OH) · 2H2O |
| 3 photos of Barbosalite associated with Quartz | SiO2 |
| 2 photos of Barbosalite associated with Scorzalite | Fe2+Al2(PO4)2(OH)2 |
Related Minerals - Strunz-mindat Grouping
| 8.BB. | Moabite | NiFe3+(PO4)O |
| 8.BB. | Tilasite | CaMg(AsO4)F |
| 8.BB. | Paulgrothite | Cu9Fe3+O4(PO4)4Cl3 |
| 8.BB. | Karlditmarite | Cu9O4(PO4)2(SO4)2 |
| 8.BB. | Milkovoite | Cu4O(PO4)(AsO4) |
| 8.BB.X | Arsenowagnerite | Mg2(AsO4)F |
| 8.BB.05 | Tavorite | LiFe3+(PO4)(OH) |
| 8.BB.05 | Amblygonite | LiAl(PO4)F |
| 8.BB.05 | Montebrasite | LiAl(PO4)(OH) |
| 8.BB.10 | Zwieselite | Fe2+2(PO4)F |
| 8.BB.10 | Triplite | Mn2+2(PO4)F |
| 8.BB.15 | 'Unnamed (Sb-analogue of Auriacusite)' | Fe3+Cu2+[(Sb,As)O4]O |
| 8.BB.15 | Joosteite | Mn2+(Mn3+,Fe3+)(PO4)O |
| 8.BB.15 | Hydroxylwagnerite | Mg2(PO4)(OH) |
| 8.BB.15 | Wagnerite | Mg2(PO4)F |
| 8.BB.15 | Stanĕkite | (Mn2+,Fe2+,Mg)Fe3+(PO4)O |
| 8.BB.15 | Triploidite | Mn2+2(PO4)(OH) |
| 8.BB.15 | Sarkinite | Mn2+2(AsO4)(OH) |
| 8.BB.15 | Wolfeite | Fe2+2(PO4)(OH) |
| 8.BB.20 | Holtedahlite | Mg2(PO4)(OH) |
| 8.BB.20 | Satterlyite | (Fe2+,Mg,Fe)12(PO4)5(PO3OH)(OH,O)6 |
| 8.BB.25 | Althausite | Mg4(PO4)2(OH,O)(F,◻) |
| 8.BB.30 | Zincolivenite | CuZn(AsO4)(OH) |
| 8.BB.30 | Adamite | Zn2(AsO4)(OH) |
| 8.BB.30 | Libethenite | Cu2(PO4)(OH) |
| 8.BB.30 | Zincolibethenite | CuZn(PO4)(OH) |
| 8.BB.30 | Eveite | Mn2+2(AsO4)(OH) |
| 8.BB.30 | Olivenite | Cu2(AsO4)(OH) |
| 8.BB.30 | Auriacusite | Fe3+Cu2+(AsO4)O |
| 8.BB.35 | Paradamite | Zn2(AsO4)(OH) |
| 8.BB.35 | Tarbuttite | Zn2(PO4)(OH) |
| 8.BB.40 | Scorzalite | Fe2+Al2(PO4)2(OH)2 |
| 8.BB.40 | Lazulite | MgAl2(PO4)2(OH)2 |
| 8.BB.40 | Meizhouite | Fe2+V3+2(PO4)2(OH)2 |
| 8.BB.40 | Hentschelite | CuFe3+2(PO4)2(OH)2 |
| 8.BB.40 | Wilhelmkleinite | ZnFe3+2(AsO4)2(OH)2 |
| 8.BB.45 | Dokuchaevite | Cu8O2(VO4)3Cl3 |
| 8.BB.45 | Trolleite | Al4(PO4)3(OH)3 |
| 8.BB.45 | Yaroshevskite | Cu9O2(VO4)4Cl2 |
| 8.BB.50 | Namibite | Cu(BiO)2(VO4)(OH) |
| 8.BB.50 | Aleutite | [Cu5O2](AsO4)(VO4) · (Cu,K,Pb,Rb,Cs,)Cl |
| 8.BB.52a | Ericlaxmanite | Cu4O(AsO4)2 |
| 8.BB.52b | Kozyrevskite | Cu4O(AsO4)2 |
| 8.BB.55 | Phosphoellenbergerite | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| 8.BB.55 | Popovite | Cu5O2(AsO4)2 |
| 8.BB.60 | Urusovite | CuAl(AsO4)O |
| 8.BB.65 | Theoparacelsite | Cu3(As2O7)(OH)2 |
| 8.BB.70 | Turanite | Cu5(VO4)2(OH)4 |
| 8.BB.75 | Stoiberite | Cu5(VO4)2O2 |
| 8.BB.80 | Fingerite | Cu11(VO4)6O2 |
| 8.BB.85 | Averievite | Cu6(VO4)2O2Cl2 |
| 8.BB.90 | Richellite | CaFe3+2(PO4)2(OH,F)2 |
| 8.BB.90 | Lipscombite | Fe2+Fe3+2(PO4)2(OH)2 |
| 8.BB.90 | Zinclipscombite | ZnFe3+2(PO4)2(OH)2 |
Fluorescence of Barbosalite
Not fluorescent in UV
Other Information
Notes:
Soluble in warm HCl. Insouble in other acids. Attacked by Clerici solution.
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 Barbosalite
mindat.org URL:
https://www.mindat.org/min-516.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Barbosalite
Reference List:
Lindberg, M. L., Pecora, W. T. (1954) Tavorite and barbosalite: two new phosphate minerals from Minas Gerais, Brazil. Science, 119 (3099) 739 doi:10.1126/science.119.3099.739
Lindberg, M. L., Pecora, W. T. (1955) Tavorite and barbosalite, two new phosphate minerals from Minas Gerais, Brazil. American Mineralogist, 40 (11-12) 952-966
Lindberg, M. L., Christ, C. L. (1959) Crystal structures of the isostructural minerals lazulite, scorzalite and barbosalite. Acta Crystallographica, 12 (9) 695-697 doi:10.1107/s0365110x5900202x
Bhaskara Rao, A., Adusumilli, Maria S. (1966) Leucophosphite and barbosalite from north-east Brazil. Mineralogical Magazine and Journal of the Mineralogical Society, 35 (273) 784-785 doi:10.1180/minmag.1966.035.273.17
van Wambeke, L. (1968) Quelques nouveaux minéraux phosphates du Congo: la landesite-(Fe), la barbosalite et la triplite. Bulletin de la Société Belge de Géologie de Paléontologie & d'Hydrologie, 77. 191-200
Mattievich, E.; Vugman, N.V.; Diehl, L.M.A.; Danon, J. (1979) Analytical interpretation of temperature dependent combined quadrupolar and magnetic hyperfine interaction in Fe2+Fe32+(PO4)2(OH)2 (barbosalite). Journal de Physique, 40 (12). 1195-1198 doi:10.1051/jphys:0197900400120119500
Plimer, I. R., Blucher, I. D. (1979) Wolfeite and barbosalite from Thackaringa, Australia. Mineralogical Magazine, 43 (328) 505-507 doi:10.1180/minmag.1979.043.328.10
Redhammer, G. J., Tippelt, G., Roth, G., Lottermoser, W., Amthauer, G. (2000) Structure and Mössbauer spectroscopy of barbosalite Fe2+Fe3+2(PO4)2(OH)2 between 80 K and 300 K. Physics and Chemistry of Minerals, 27 (6) 419-429 doi:10.1007/s002699900078
Frost, Ray L.; Xi, Yunfei; López, Andrés; Scholz, Ricardo; Lana, Cristiano de Carvalho; Souza, Bárbara Firmino e (2013) Vibrational spectroscopic characterization of the phosphate mineral barbosalite Fe 2 + Fe 2 3 + ( PO 4 ) 2 ( OH ) 2
Localities for Barbosalite
Showing 49 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.
Argentina | |
| Rocks & Min. (2007) |
Australia | |
| Plimer et al. (1979) +1 other reference |
| Record of Sth.Aust. mines summary Olary ... |
Brazil | |
| Gaines et al. (1979) |
| Sergio Varvello collection |
| Baijot et al. (2014) +1 other reference | |
| Sergio Varvello collection | |
| Sergio Varvello collection |
| SOSMAN (1954) +2 other references |
| Atencio et al. (2006) |
| Wegner et al. (1998) |
| Bhaskara Rao et al. (1966) |
Czech Republic | |
| Škoda et al. (2007) +1 other reference |
France | |
| perso.wanadoo.fr (2004) |
Germany | |
| Fehr et al. (1985) |
| Dill et al. (2009) |
| web.archive.org (2001) |
Italy | |
| Raudsepp M. and Pani E. (1994) |
Liberia | |
| a reconnaissance report. USGS Bulletin ... +1 other reference |
Madagascar | |
| Behier (1960) |
| Collection Musée National de la ... |
Morocco | |
| ČECH et al. (1972) +1 other reference |
| Favreau (2012) |
Namibia | |
| von Bezing (2007) |
| Keller (1974) | |
| Förch (1998) |
| von Bezing (2007) |
| Keller et al. (1989) |
| Fransolet et al. (1986) |
Portugal | |
| |
| Favreau (n.d.) |
| Anthony et al. (2000) |
| Pedro Alve's information Jan 2014 |
Rwanda | |
| Daltry et al. (1998) +1 other reference |
South Africa | |
| Cairncross et al. (1995) |
Spain | |
| Roda et al. (2001) |
| Encarnación Roda-Robles (2007) +1 other reference |
| www.foro-minerales.com (n.d.) |
| Roda-Robles et al. (1998) |
UK | |
| Golley et al. (1995) |
| Elton (1998) +1 other reference |
USA | |
| Leavens et al. (1975) +1 other reference |
| Moore (1973) +1 other reference |
| Thompson et al. (2022) |
| Peacor (1969) |
| Rocks & Minerals: 60: 117. +1 other reference |
| Peacor et al. (1984) |
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Bull Moose Mine, Custer, Custer Mining District, Custer County, South Dakota, USA