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Mantienneite Mineral Data

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General Mantienneite Information

Help on Chemical  Formula: Chemical Formula: KMg2Al2Ti(PO4)4(OH)3•15(H2O)
Help on Composition: Composition: Molecular Weight = 890.69 gm
   Potassium    4.39 %  K     5.29 % K2O
   Magnesium    5.46 %  Mg    9.05 % MgO
   Titanium     5.38 %  Ti    8.97 % TiO2
   Aluminum     6.06 %  Al   11.45 % Al2O3
   Phosphorus  13.91 %  P    31.87 % P2O5
   Hydrogen     3.73 %  H    33.37 % H2O
   Oxygen      61.07 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KMg2Al2Ti(PO4)4(OH)3•15(H2O)
Help on Environment: Environment: Replacing minerals in and forming the matrix of sandy layers in lacustrine shale.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Anloua, near Ngaoundere, Cameroon. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Joseph Mantienne (1929-), Bureau de Recherches G�eologiques et Mini`eres, Orl`eans, France.
Help on Name Pronunciation: Name Pronunciation: Mantienneite + Pronunciation Say MANTIENNEITE
 

Mantienneite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.512:1:0.6056
Help on Cell Dimensions: Cell Dimensions: a = 10.409, b = 20.33, c = 12.312, Z = 4; V = 2,605.40 Den(Calc)= 2.27
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.158(1), 3.076(0.6), 10.18(0.4),
 

Physical Properties of Mantienneite

Help on Cleavage: Cleavage: {001} Perfect, {010} Indistinct
Help on Color: Color: Yellow brown.
Help on Density: Density: 2.31
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: reddish gray
 

Optical Properties of Mantienneite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2559,KPDmeas= 0.2515,KC= 0.2592
Ncalc = 1.59 - 1.6
Help on Optical Data: Optical Data: Biaxial (-), a=1.564, g=1.598, bire=0.0340, 2V(Meas)=50-60.
 

Calculated Properties of Mantienneite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.32 gm/cc
note: Specific Gravity of Mantienneite =2.27 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEMantienneite = 2.32 barns/electron
U=PEMantienneite x relectron= 5.38 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 64.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Mantienneite per GRapi unit = 1.54 (%)

Estimated Radioactivity from Mantienneite - barely detectable

 

Mantienneite Classification

Help on  Dana Class: Dana Class: 42.11.21.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.21)Paulkerrite Group
 
42.11.21.01 Paulkerrite K(Mg,Mn)2(Fe,Al)2Ti(PO4)4(OH)3•15(H2O) P bca 2/m 2/m 2/m
 
42.11.21.02 Mantienneite KMg2Al2Ti(PO4)4(OH)3•15(H2O) P bca 2/m 2/m 2/m
 
42.11.21.03 Matveevite? KTiMn2Fe2(PO4)4(OH)3•15(H2O) Pnam ro P na21 Ortho
 
42.11.21.04 Benyacarite (H2O,K)2Ti(Mn,Fe)2(Fe,Ti)2Ti(PO4)4(O,F)2•14(H2O) P bca 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.DH.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
 
08.DH.35 Benyacarite (H2O,K)2Ti(Mn,Fe)2(Fe,Ti)2Ti(PO4)4(O,F)2•14(H2O) P bca 2/m 2/m 2/m
 
08.DH.35 Matveevite? KTiMn2Fe2(PO4)4(OH)3•15(H2O) Pnam ro P na21 Ortho
 
08.DH.35 Mantienneite KMg2Al2Ti(PO4)4(OH)3•15(H2O) P bca 2/m 2/m 2/m
 
08.DH.35 Paulkerrite K(Mg,Mn)2(Fe,Al)2Ti(PO4)4(OH)3•15(H2O) P bca 2/m 2/m 2/m
 

Other Mantienneite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Mantienneite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Mantienneite Specimen Label here :

Mantienneite

KMg2Al2Ti(PO4)4(OH)3•15(H2O)
Dana No: 42.11.21.02 Strunz No: 08.DH.35
Locality:

 

Notes:

 

 
   
 


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