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Matioliite
A valid IMA mineral species
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About Matioliite
Formula:
NaMgAl5(PO4)4(OH)6 · 2H2O
Colour:
Blue to colourless
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
2.948 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named for Paulo Anselmo Matioli (b. 1975)
Type Locality:
Isostructural with:
Unique Identifiers
Mindat ID:
27412
Long-form identifier:
mindat:1:1:27412:4
Similar Names
| Meta-illite | Invalid as an unnamed mineral | K2O · 3Al2O3 · 6SiO2 |
IMA Classification of Matioliite
Classification of Matioliite
8.DK.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
K : With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
K : With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
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 |
|---|---|---|
| Mti | 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 Matioliite
Vitreous
Transparency:
Transparent
Colour:
Blue to colourless
Streak:
White
Hardness:
5 on Mohs scale
Hardness Data:
Measured
Density:
2.948 g/cm3 (Calculated)
Optical Data of Matioliite
Type:
Biaxial (-)
RI values:
nα = 1.597 nβ = 1.627 nγ = 1.627
2V:
Measured: 43° , Calculated: 44°
Max. Birefringence:
δ = 0.030
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.
Dispersion:
r > v
Pleochroism:
Visible
Comments:
Y > X > Z, X = light blue to colorless, Y = blue, Z = colorless
Chemistry of Matioliite
Mindat Formula:
NaMgAl5(PO4)4(OH)6 · 2H2O
Element Weights:
Crystallography of Matioliite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 25.075 Å, b = 5.047 Å, c = 13.437 Å
β = 110.97°
β = 110.97°
Ratio:
a:b:c = 4.968 : 1 : 2.662
Unit Cell V:
1587.9 ų
Z:
4
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) |
|---|---|---|---|---|---|---|---|
| 0004259 | Matioliite | Atencio D, Coutinho J M V, Mascarenhas Y P, Ellena J A (2006) Matioliite, the Mg-analogue of burangaite, from Gentil mine, Mendes Pimentel, Minas Gerais, Brazil, and other occurrences American Mineralogist 91 1932-1936 |  | 2006 | Gentil mine, Mendes Pimentel, Minas Gerais, Brazil | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.654 Å | (100) |
| 6.581 Å | (62) |
| 5.833 Å | (20) |
| 4.930 Å | (13) |
| 4.862 Å | (62) |
| 4.011 Å | (15) |
| 3.553 Å | (18) |
| 3.291 Å | (23) |
| 3.138 Å | (14) |
| 3.103 Å | (31) |
| 3.075 Å | (19) |
| 3.027 Å | (40) |
| 2.912 Å | (12) |
| 2.785 Å | (17) |
| 2.666 Å | (45) |
| 2.517 Å | (09) |
| 2.349 Å | (18) |
| 2.342 Å | (09) |
| 2.041 Å | (15) |
| 2.040 Å | (07) |
| 1.940 Å | (12) |
| 1.936 Å | (07) |
| 1.678 Å | (14) |
| 1.672 Å | (09) |
Comments:
Gentil mine
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 Matioliite
General Appearance of Type Material:
Prismatic to tabular crystals, up to 1 mm long
Place of Conservation of Type Material:
Museum of Geosciences, Department of Geosciences, University of Sao Paulo, Brazil
"Jose Bonifacio de Andrada e Silva" (Jobas) Museum of Natural Sciences, Santos, Sao Paulo, Brazil
"Jose Bonifacio de Andrada e Silva" (Jobas) Museum of Natural Sciences, Santos, Sao Paulo, Brazil
Geological Setting of Type Material:
Secondary hydrothermal mineralization in a granite pegmatite
Associated Minerals at Type Locality:
Synonyms of Matioliite
Other Language Names for Matioliite
Dutch:Matioliiet
German:Matioliit
Relationship of Matioliite to other Species
Member of:
Other Members of Dufrénite Group:
| Bimbowrieite | NaMgFe3+5(PO4)4(OH)6 · 2H2O | Mon. 2/m : B2/b |
| Burangaite | NaFe2+Al5(PO4)4(OH)6 · 2H2O | Mon. 2/m : B2/b |
| Dufrénite | Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O | Mon. 2/m : B2/b |
| Gayite | NaMn2+Fe3+5(PO4)4(OH)6 · 2H2O | Mon. 2/m : B2/b |
| Natrodufrénite | NaFe3+Fe3+5(PO4)4O(OH)5(H2O)2 | Mon. 2/m : B2/b |
Forms a series with:
Common Associates
Associations Based on Photo Data:
| 14 photos of Matioliite associated with Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
| 9 photos of Matioliite associated with Albite | Na(AlSi3O8) |
| 5 photos of Matioliite associated with Gormanite | (Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O |
| 4 photos of Matioliite associated with Fluorapatite | Ca5(PO4)3F |
| 3 photos of Matioliite associated with 'Gormanite-Souzalite Series' | |
| 2 photos of Matioliite associated with Brazilianite | NaAl3(PO4)2(OH)4 |
| 1 photo of Matioliite associated with Montebrasite | LiAl(PO4)(OH) |
| 1 photo of Matioliite associated with Siderite | FeCO3 |
| 1 photo of Matioliite associated with Quartz | SiO2 |
| 1 photo of Matioliite associated with 'Burangaite-Matioliite Series' |
Related Minerals - Strunz-mindat Grouping
| 8.DK. | Regerite | KFe6(PO4)4(OH)7(H2O)6 · 4H2O |
| 8.DK. | Richelsdorfite | Ca2Cu5Sb(AsO4)4(OH)6Cl · 6H2O |
| 8.DK. | Bimbowrieite | NaMgFe3+5(PO4)4(OH)6 · 2H2O |
| 8.DK. | Puttapaite | Pb2Mn2+2ZnCr3+4O2(AsO4)4(OH)6 · 12H2O |
| 8.DK.10 | Thalliumpharmacosiderite | TlFe3+4[(AsO4)3(OH)4] · 4H2O |
| 8.DK.10 | Natropharmacosiderite | NaFe3+4(AsO4)3(OH)4 · 4H2O |
| 8.DK.10 | Pharmacosiderite | KFe3+4(AsO4)3(OH)4 · 6-7H2O |
| 8.DK.10 | Plumbopharmacosiderite | Pb0.5Fe3+4(AsO4)3(OH)4 · 5H2O |
| 8.DK.10 | Strontiopharmacosiderite | Sr0.5Fe3+4[(AsO4)3(OH)4] · 4H2O |
| 8.DK.10 | Bariopharmacosiderite | Ba0.5Fe3+4(AsO4)3(OH)4 · 5H2O |
| 8.DK.10 | Hydroniumpharmacosiderite | (H3O)Fe3+4(AsO4)3(OH)4 · 4H2O |
| 8.DK.12 | Hydroniumpharmacoalumite | (H3O)Al4(AsO4)3(OH)4 · 4.5H2O |
| 8.DK.12 | Bariopharmacoalumite | Ba0.5Al4(AsO4)3(OH)4 · 4H2O |
| 8.DK.12 | Pharmacoalumite | KAl4(AsO4)3(OH)4 · 6.5H2O |
| 8.DK.12 | Calciopharmacoalumite | Ca0.5Al4(AsO4)3(OH)4 · 5H2O |
| 8.DK.12 | Natropharmacoalumite | NaAl4(AsO4)3(OH)4 · 4H2O |
| 8.DK.15 | Burangaite | NaFe2+Al5(PO4)4(OH)6 · 2H2O |
| 8.DK.15 | Natrodufrénite | NaFe3+Fe3+5(PO4)4O(OH)5(H2O)2 |
| 8.DK.15 | Dufrénite | Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O |
| 8.DK.15 | Gayite | NaMn2+Fe3+5(PO4)4(OH)6 · 2H2O |
| 8.DK.20 | Kidwellite | NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33 |
| 8.DK.25 | Bleasdaleite | (Ca,Fe3+)2Cu5(Bi,Cu)(PO4)4(H2O,OH,Cl)13 |
| 8.DK.30 | Matulaite | (Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2O |
| 8.DK.35 | Krasnovite | Ba(Al,Mg)(PO4,CO3)(OH)2 · H2O |
Fluorescence of Matioliite
non-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 Matioliite
mindat.org URL:
https://www.mindat.org/min-27412.html
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References for Matioliite
Localities for Matioliite
Showing 4 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.
Austria | |
| Niedermayr et al. (2001) |
Brazil (TL) | |
| Am.Min 91 (2006) +1 other reference |
Canada | |
| XRD and EDS analyses by Dr Anthony Kampf +1 other reference |
USA | |
| Newmont Mining Corporation |
Quick NavTopAbout MatioliiteUnique IdentifiersSimilar NamesIMA 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
Gentil claim, Mendes Pimentel, Minas Gerais, Brazil