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About MatioliiteHide

NaMgAl5(PO4)4(OH)6 · 2H2O
Blue to colourless
Specific Gravity:
2.948 (Calculated)
Crystal System:
Named for Paulo Anselmo Matioli (b. 1975)

Classification of MatioliiteHide

Approval Year:

D : Phosphates, etc. with additional anions, with H2O
K : With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1

Physical Properties of MatioliiteHide

Blue to colourless
Hardness Data:
2.948 g/cm3 (Calculated)

Optical Data of MatioliiteHide

Biaxial (-)
RI values:
nα = 1.597 nβ = 1.627 nγ = 1.627
Measured: 43° , Calculated: 44°
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r > v
Y > X > Z, X = light blue to colorless, Y = blue, Z = colorless

Chemical Properties of MatioliiteHide

NaMgAl5(PO4)4(OH)6 · 2H2O

Crystallography of MatioliiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 25.075 Å, b = 5.047 Å, c = 13.437 Å
β = 110.97°
a:b:c = 4.968 : 1 : 2.662
Unit Cell V:
1587.9 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
11.654 (100)
6.581 (62)
5.833 (20)
4.930 (13)
4.862 (62)
4.011 (15)
3.553 (18)
3.291 (23)
3.138 (14)
3.103 (31)
3.075 (19)
3.027 (40)
2.912 (12)
2.785 (17)
2.666 (45)
2.517 (09)
2.349 (18)
2.342 (09)
2.041 (15)
2.040 (07)
1.940 (12)
1.936 (07)
1.678 (14)
1.672 (09)
Gentil mine

Type Occurrence of MatioliiteHide

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
Geological Setting of Type Material:
Secondary hydrothermal mineralization in a granite pegmatite
Associated Minerals at Type Locality:

Synonyms of MatioliiteHide

Relationship of Matioliite to other SpeciesHide

Other Members of this group:
BurangaiteNaFe2+Al5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
DufréniteCa0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
GayiteNaMn2+Fe3+5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
NatrodufréniteNaFe2+Fe3+5(PO4)4(OH)6 · 2H2OMon.
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
Crandallite1 photo of Matioliite associated with Crandallite on
Quartz1 photo of Matioliite associated with Quartz on
Brazilianite1 photo of Matioliite associated with Brazilianite on
Fluorapatite1 photo of Matioliite associated with Fluorapatite on
Montebrasite1 photo of Matioliite associated with Montebrasite on

Related Minerals - Nickel-Strunz GroupingHide

8.DK.RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2OMon. 2/m : B2/m
8.DK.10BariopharmacosideriteBa0.5Fe3+4(AsO4)3(OH)4 · 5H2OTet. 4 2m : P4 2m
8.DK.10PharmacosideriteKFe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
8.DK.10Natropharmacosiderite(Na,K)Fe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
8.DK.10Hydroniumpharmacosiderite(H3O)Fe4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.12PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2OIso. 4 3m : P4 3m
8.DK.12NatropharmacoalumiteNaAl4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.12BariopharmacoalumiteBa0.5Al4(AsO4)3(OH)4 · 4H2OIso. 4 3m : P4 3m
8.DK.15BurangaiteNaFe2+Al5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.15DufréniteCa0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.15NatrodufréniteNaFe2+Fe3+5(PO4)4(OH)6 · 2H2OMon.
8.DK.15GayiteNaMn2+Fe3+5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
8.DK.20KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33Mon. 2/m : P2/b
8.DK.30Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2OMon.
8.DK.35KrasnoviteBa(Al,Mg)(PO4,CO3)(OH)2 · H2OOrth.

Fluorescence of MatioliiteHide


Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for MatioliiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Atencio, D., J.M.V. Coutinho, Y.P. Mascarenhas, and J.A. Ellena (2006): "Matioliite, the Mg-analog of burangaite, from Gentil mine, Mendes Pimentel, Minas Gerais, Brazil, and other occurrences". Am. Mineral. 91:1932-1936.

Internet Links for MatioliiteHide

Localities for MatioliiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Carinthia
    • Millstatt lake ridge
      • Spittal
        • Millstatt lake
Walter, F. & Ettinger, K. (2001): 1250. Burangait vom Hochgosch, Millstätter See-Rücken. Pp. 149-150 in NIEDERMAYR, G., F. BERNHARD, G. BLASS, H.-P. BOJAR, F. BRANDSTÄTTER, K. ETTINGER, H.-W. GRAF, V. M. F. HAMMER, B. LEIKAUF, H. MEDITZ, B. MOSER, W. POSTL, J. TAUCHER & P. TOMAZIC (2001): Neue Mineralfunde aus Österreich L. Carinthia II, 191./111.: 141-185.
Brazil (TL)
  • Minas Gerais
    • Mendes Pimentel
Am.Min 91,1932-1936(2006); Atencio, D., Coutinho, J.M.V., Mascarenhas, Y.P., Ellena, J. (2006): Matioliite, the Mg-analog of burangaite, from Gentil mine, Mendes Pimentel, Minas Gerais, Brazil, and other occurrences. American Mineralogist, 91, 1932-1936.
  • Yukon
    • Dawson mining district
XRD and EDS analyses by Dr Anthony Kampf, Los Angeles County Museum of Natural History, 27 January 2017; Petrov, Alfredo (2017) A new species for Canada. Mineral News, 33, #4, 15.
  • Nevada
    • Eureka Co.
      • Carlin Trend
        • Maggie Creek Subdistrict
Am. Min. 91, 1932-1936 (2006)
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