Bianchiniite
A valid IMA mineral species
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About Bianchiniite
Formula:
Ba2(TiV)(As2O5)2OF
Colour:
brown
Lustre:
Vitreous
Specific Gravity:
4.863 (Calculated)
Crystal System:
Tetragonal
Name:
Name honours the mineral collectors Andrea Bianchini (born 5th September 1959) and Mario Bianchini (born 28th August 1962) (no relationship between them) for their contribution to the knowledge of the mineralogy of pyrite ± baryte ± iron-oxide ore deposits of the southern Apuan Alps, northern Tuscany, Italy.
Unique combination of elements. New structure type. A natural Ti-V arsenite (diarsenite). Chemically related to hemloite and tomichite.
Unique Identifiers
Mindat ID:
53685
Long-form identifier:
mindat:1:1:53685:7
GUID
(UUID V4):
(UUID V4):
ba3dae70-cb6b-4191-9d84-ea3a22a3cfa6
IMA Classification of Bianchiniite
Approved
Approval year:
2019
First published:
2021
Classification of Bianchiniite
4.JB.90
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
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 |
|---|---|---|
| Bcn | 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 Bianchiniite
Vitreous
Transparency:
Transparent
Colour:
brown
Streak:
brownish
Hardness Data:
Could not be measured
Tenacity:
Brittle
Cleavage:
Perfect
{001}
{001}
Fracture:
Irregular/Uneven
Density:
4.863 g/cm3 (Calculated)
Comment:
Calculated from empirical formula
Optical Data of Bianchiniite
Anisotropism:
shades of grey
Bireflectance:
weak
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 6.6% | 7.7% |
| 440nm | 5.0% | 5.8% |
| 470nm | 5.0% | 5.8% |
| 480nm | 5.0% | 5.9% |
| 520nm | 5.5% | 6.3% |
| 546nm | 5.7% | 6.5% |
| 560nm | 5.7% | 6.8% |
| 589nm | 5.7% | 7.0% |
| 620nm | 5.5% | 6.8% |
| 650nm | 5.2% | 6.3% |
| 660nm | 5.2% | 6.3% |
| 700nm | 5.0% | 6.3% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 7.7%.
R1 shown in black, R2 shown in red
Colour in reflected light:
grey
Internal Reflections:
orange–yellow
Chemistry of Bianchiniite
Mindat Formula:
Ba2(TiV)(As2O5)2OF
Crystallography of Bianchiniite
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I4/mcm
Setting:
I4/mcm
Cell Parameters:
a = 8.7266(4) Å, c = 15.6777(7) Å
Ratio:
a:c = 1 : 1.797
Unit Cell V:
1193.91 ų
Z:
4
Morphology:
Tabular
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.826 Å | (w) |
| 3.144 Å | (vs) |
| 2.916 Å | (w) |
| 2.789 Å | (w) |
| 2.598 Å | (w) |
| 2.119 Å | (w) |
| 2.072 Å | (w) |
| 1.975 Å | (w) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47e : [Vanadates, chromates, manganates] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Bianchiniite
General Appearance of Type Material:
It occurs as brown {001} tabular crystals, up to 1 mm across
Place of Conservation of Type Material:
Mineralogical collections of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), Italy, catalogue number 1989
Associated Minerals at Type Locality:
Reference:
Biagioni, C., Pasero, M., Hålenius, U., & Bosi, F. (2021) Bianchiniite, Ba2 (Ti4+ V3+)(As2O5) 2OF, a new diarsenite mineral from the Monte Arsiccio mine, Apuan Alps, Tuscany, Italy. Mineralogical Magazine, 1-10.
Synonyms of Bianchiniite
Common Associates
Associated Minerals Based on Photo Data:
| 1 photo of Bianchiniite associated with Hyalophane | (K,Ba)[Al(Si,Al)Si2O8] |
| 1 photo of Bianchiniite associated with Chlorite Group | |
| 1 photo of Bianchiniite associated with Siderite | FeCO3 |
| 1 photo of Bianchiniite associated with Aragonite | CaCO3 |
Related Minerals - Strunz-mindat Grouping
| 4.JB. | Cuyaite | Ca2Mn3+As3+14O24Cl |
| 4.JB. | Brattforsite | Mn19(AsO 3)12Cl2 |
| 4.JB.05 | Fetiasite | (Fe3+,Fe2+,Ti)3(As2O5)O2 |
| 4.JB.10 | Manganarsite | Mn3(As2O4)(OH)4 |
| 4.JB.15 | Magnussonite | Mn2+10(As3+O3)6(OH,Cl)2 |
| 4.JB.15 | UM1984-09-AsO:ClHMn | Mn10As6O18(OH)Cl |
| 4.JB.20 | Armangite | Mn2+26(AsO3)14(HAsO3)4(CO3) |
| 4.JB.25 | Nanlingite | Na(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14 |
| 4.JB.30 | Asbecasite | Ca3(Ti,Sn4+)Be2(AsO3)6(SiO4)2 |
| 4.JB.35 | Stenhuggarite | CaFeSb(AsO3)2O |
| 4.JB.40 | Trigonite | Pb3Mn2+(AsO3)2(HAsO3) |
| 4.JB.45 | Finnemanite | Pb5(AsO3)3Cl |
| 4.JB.50 | Gebhardite | Pb8(As2O5)2OCl6 |
| 4.JB.55 | Derbylite | Fe3+4Ti3Sb3+O13(OH) |
| 4.JB.55 | Tomichite | (V,Fe)4Ti3AsO13(OH) |
| 4.JB.55 | Graeserite | Fe3+4Ti3As3+O13(OH) |
| 4.JB.60 | Hemloite | (Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH) |
| 4.JB.65 | Freedite | Cu+Pb8(AsO3)2O3Cl5 |
| 4.JB.70 | Georgiadesite | Pb4(As3+O3)Cl4(OH) |
| 4.JB.75 | Ekatite | (Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6 |
| 4.JB.75 | Szklaryite | ◻Al6BAs3+3O15 |
| 4.JB.85 | Lepageite | Mn2+3(Fe3+7Fe2+4)O3[Sb3+5As3+8O34] |
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 Bianchiniite
mindat.org URL:
https://www.mindat.org/min-53685.html
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References for Bianchiniite
Reference List:
Localities for Bianchiniite
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) | |
|
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Sant'Olga tunnel, Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy