Matioliite Mineral Data (original) (raw)
General Matioliite Information
Chemical Formula:
NaMgAl5(PO4)4(OH)6•2H2O
Composition:
Molecular Weight = 784.62 gm
Sodium 2.75 % Na 3.71 % Na2O
Calcium 0.05 % Ca 0.07 % CaO
Magnesium 2.73 % Mg 4.52 % MgO
Manganese 0.07 % Mn 0.09 % MnO
Aluminum 16.64 % Al 31.45 % Al2O3
Iron 1.71 % Fe 1.01 % FeO / 1.32 % Fe2O3
Phosphorus 15.91 % P 36.45 % P2O5
Hydrogen 1.74 % H 15.52 % H2O
Oxygen 58.40 % O
______ ______
100.00 % 94.15 % = TOTAL OXIDE
Empirical Formula:
Na0.94Ca0.01Mg0.88Fe2+0.11Mn2+0.01Al4.84Fe3+0.13(PO4)4.032(OH)5.76�(H2O)
Environment:
Occurs as a secondary mineral in vugs from the Gentil mine granitic pegmatite. Dufrenite group. Magnesium analog of burangaite.
IMA Status:
Approved IMA 2005 (Dana # Added)
Locality:
Gentil mine, Mendes Pimentel County, Minas Gerais, Brazil Link to MinDat.org Location Data.
Name Origin:
Named in honor of Paulo Anselmo Matioli (b.1975), mineral collector, founder, and curator of the Museu de Ci�ncias Naturais Jobas "Jose Bonif�cio de Andrada e Silva" Santos, SP, Bra zil.
Synonym:
IMA2005-011
Matioliite Image
Images:
 |
Matioliite Comments: fiberous, blueish, matioliite aggregate on quartz. Location: Gentil mine, Mendes Pimentel, Minas Gerais, Brazil.Scale: See Image. © American Mineralogist |
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Matioliite Crystallography
Axial Ratios:
a:b:c =4.9682:1:2.6623
Cell Dimensions:
a = 25.075, b = 5.047, c = 13.437, Z = 4; beta = 110.97° V = 1,587.87 Den(Calc)= 3.28
Crystal System:
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
X Ray Diffraction:
By Intensity(I/Io): 11.654(1), 4.862(0.62), 6.581(0.62),2.666(0.45), 3.027(0.4), 3.291(0.23),
Crystal Structure:
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| | Atencio D , Coutinho J M V , Mascarenhas Y P , Ellena J A , American Mineralogist , 91 (2006) p.1932-1936, Matioliite, the Mg-analogue of burangaite, from Gentil mine, Mendes Pimentel,, Minas Gerais, Brazil, and other occurrences, Locality: Gentil mine, Mendes Pimentel, Minas Gerais, Brazil, Sample: T = 120 K | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Matioliite
Cleavage:
{100} Perfect
Color:
Blue, Colorless.
Diaphaneity:
Transparent
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Matioliite
Gladstone-Dale:
CI calc= 0.089 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1886,KC= 0.2071
Ncalc = 1.68
Optical Data:
Biaxial (-), a=1.597, b=1.627, g=1.632, bire=0.0350, 2V(Calc)=42, 2V(Meas)=43. Dispersion r > v.
Calculated Properties of Matioliite
Electron Density:
Bulk Density (Electron Density)=3.29 gm/cc
note: Specific Gravity of Matioliite =3.28 gm/cc.
Fermion Index:
Fermion Index = 0.003371735
Boson Index = 0.996628265
Photoelectric:
PEMatioliite = 1.93 barns/electron
U=PEMatioliite x rElectron Density= 6.35 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Matioliite is Not Radioactive
Matioliite Classification
Dana Class:
42.09.01.05 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.09)where (A)3 (XO4)2 Zq � x(H2O)
(42.09.01)Burangaite Group
42.09.01.01 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12•4(H2O) C 2/c 2/m
42.09.01.02 Dufrenite FeFe4(PO4)3(OH)5•2(H2O) C 2/c 2/m
42.09.01.03 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6•2(H2O) C 2/c 2/m
42.09.01.04 IMA2008-056! NaMnFe5(PO4)4(OH)6•2H2O C 2/c 2/m
42.09.01.05 Matioliite! NaMgAl5(PO4)4(OH)6•2H2O C 2/c 2/m
Strunz Class:
08.DK.15 08 - PHOSPHATES, ARSENATES, VANADATES
08.D - Phosphates, etc
08.DK -With large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
08.DK.15 Dufrenite FeFe4(PO4)3(OH)5•2(H2O) C 2/c 2/m
08.DK.15 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12•4(H2O) C 2/c 2/m
08.DK.15 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6•2(H2O) C 2/c 2/m
08.DK.15 Matioliite! NaMgAl5(PO4)4(OH)6•2H2O C 2/c 2/m
08.DK.15 IMA2008-056! NaMnFe5(PO4)4(OH)6•2H2O C 2/c 2/m
Other Matioliite Information
References:
NAME( AmMin, v91, p1932) PHYS. PROP.(AmMin, v91, p1932) OPTIC PROP.(AmMin, v91, p1932)
See Also:
Links to other databases for Matioliite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Matioliite
NaMgAl5(PO4)4(OH)6•2H2O
Dana No: 42.09.01.05 Strunz No: 08.DK.15
Locality:
Notes: