Log In
Vanadiocarpholite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Vanadiocarpholite
Formula:
Mn2+V3+Al(Si2O6)(OH)4
Colour:
Pale-straw yellow, honey-yellow to brown
Lustre:
Vitreous, Silky
Specific Gravity:
3.10
Crystal System:
Orthorhombic
Member of:
Name:
Named after its chemical composition and the relation to carpholite which itself was named after the Greek words for "straw" and "stone", because of the colour.
Type Locality:
Unique Identifiers
Mindat ID:
26774
Long-form identifier:
mindat:1:1:26774:4
IMA Classification of Vanadiocarpholite
Approved
IMA Formula:
Mn2+V3+AlSi2O6(OH)4
Approval year:
2003
First published:
2005
Type description reference:
Classification of Vanadiocarpholite
9.DB.05
9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
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 |
|---|---|---|
| Vcar | 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 Vanadiocarpholite
Vitreous, Silky
Transparency:
Transparent
Colour:
Pale-straw yellow, honey-yellow to brown
Streak:
Nearly white
Hardness Data:
Could not be measured
Tenacity:
Brittle
Cleavage:
Perfect
{010}
{010}
Parting:
Not observed
Density:
3.10 g/cm3 (Measured) 3.15 g/cm3 (Calculated)
Optical Data of Vanadiocarpholite
Type:
Biaxial (-)
RI values:
nα = 1.684(2) nβ = 1.691 nγ = 1.700(3)
2V:
Measured: 85° (2)
Max. Birefringence:
δ = 0.016
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.
Pleochroism:
Visible
Comments:
α = yellow-brown and γ = yellow-pinkish
Comments:
Negative elongation.
β is calculated.
β is calculated.
Chemistry of Vanadiocarpholite
Mindat Formula:
Mn2+V3+Al(Si2O6)(OH)4
Element Weights:
Crystallography of Vanadiocarpholite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Ccca
Cell Parameters:
a = 13.830(2) Å, b = 20.681(3) Å, c = 5.188(1) Å
Ratio:
a:b:c = 0.669 : 1 : 0.251
Unit Cell V:
1483.9 ų
Z:
8
Morphology:
Prismatic to acicular crystals.
Twinning:
Not observed
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0007106 | Vanadiocarpholite | Basso R, Cabella R, Lucchetti G, Martinelli A, Palenzona A (2005) Vanadiocarpholite, Mn2+V3+Al(Si2O6)(OH)4, a new mineral from the Molinello mine, northern Apennines, Italy European Journal of Mineralogy 17 501-507 | 2005 | Molinello mine, northern Apennines, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.746 Å | (100) |
| 2.641 Å | (26) |
| 3.075 Å | (22) |
| 5.150 Å | (18) |
| 3.460 Å | (15) |
| 4.720 Å | (14) |
| 2.872 Å | (8) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Vanadiocarpholite
General Appearance of Type Material:
Veinlets and radiating aggregates of strongly elongated, prismatic to acicular crystals up to about 0.28 mm.
Place of Conservation of Type Material:
University of Genova, Genova, Italy
Geological Setting of Type Material:
In silicified wood in Mn-ore-bearing radiolarian cherts.
Associated Minerals at Type Locality:
Reference:
Synonyms of Vanadiocarpholite
Other Language Names for Vanadiocarpholite
Relationship of Vanadiocarpholite to other Species
Member of:
Other Members of Carpholite Group:
| Carpholite | Mn2+Al2(Si2O6)(OH)4 | Orth. mmm(2/m2/m2/m) : Ccca |
| Ferrocarpholite | Fe2+Al2Si2O6(OH)4 | Orth. mmm(2/m2/m2/m) : Ccca |
| Magnesiocarpholite | MgAl2Si2O6(OH)4 | Orth. mmm(2/m2/m2/m) : Ccca |
| Potassiccarpholite | K(Mn2+,Li)2Al4Si4O12(OH,F)8 | Orth. mmm(2/m2/m2/m) : Ccca |
Common Associates
Associations Based on Photo Data:
| 2 photos of Vanadiocarpholite associated with Volborthite | Cu3(V2O7)(OH)2 · 2H2O |
| 1 photo of Vanadiocarpholite associated with Ganophyllite | (K,Na)xMn2+6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11) |
| 1 photo of Vanadiocarpholite associated with Cortesognoite | CaV2(Si2O7)(OH)2 · H2O |
| 1 photo of Vanadiocarpholite associated with 'Chalcedony' | SiO2 |
Related Minerals - Strunz-mindat Grouping
| 9.DB.05 | Potassiccarpholite | K(Mn2+,Li)2Al4Si4O12(OH,F)8 |
| 9.DB.05 | Carpholite | Mn2+Al2(Si2O6)(OH)4 |
| 9.DB.05 | Magnesiocarpholite | MgAl2Si2O6(OH)4 |
| 9.DB.05 | Ferrocarpholite | Fe2+Al2Si2O6(OH)4 |
| 9.DB.05 | Balipholite | BaLiMg2Al3(Si2O6)2(OH)4 |
| 9.DB.10 | Lorenzenite | Na2Ti2(Si2O6)O3 |
| 9.DB.15 | Punkaruaivite | LiTi2(HSi4O12)(OH)2 · H2O |
| 9.DB.15 | Lintisite | LiNa3Ti2(Si2O6)2O2 · 2H2O |
| 9.DB.17 | Eliseevite | LiNa1.5Ti2(H1.5Si4O12)O2 · 2H2O |
| 9.DB.20 | Kukisvumite | Na6ZnTi4(Si8O24)O4 · 4H2O |
| 9.DB.20 | Manganokukisvumite | Na6MnTi4(Si8O24)O4 · 4H2O |
| 9.DB.25 | Vinogradovite | Na4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3 |
| 9.DB.25 | Paravinogradovite | Na1-2(Ti,Fe3+)4(Si2O6)2(AlSi3O10)(OH)4 · H2O |
| 9.DB.30 | Nchwaningite | Mn2+2(SiO3)(OH)2 · H2O |
| 9.DB.40 | Shattuckite | Cu5(Si2O6)2(OH)2 |
| 9.DB.40 | 'UM2005-31-SiO:CuH' | Cu11(SiO4)(OH)18 · 9H2O (?) |
| 9.DB.45 | Aerinite | (Ca5.1Na0.5)(Fe3+,Al,Fe2+,Mg)4(Al,Mg)6[HSi12O36(OH)12][(CO3)1.2(H2O)12] |
| 9.DB.50 | Capranicaite | KCaNaAl4B4Si2O18 |
Fluorescence of Vanadiocarpholite
Not fluorescent
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 Vanadiocarpholite
mindat.org URL:
https://www.mindat.org/min-26774.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Vanadiocarpholite
Reference List:
Localities for Vanadiocarpholite
Showing 3 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) | |
| Palenzona et al. (2006) +2 other references |
| Redazione (2005) |
| Castellaro et al. (2023) |
Quick NavTopAbout VanadiocarpholiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Molinello Mine, Ne, Genoa, Liguria, Italy