Mantienneite Mineral Data
General Mantienneite Information
Chemical Formula:
KMg2Al2Ti(PO4)4(OH)3•15(H2O)
Composition:
Molecular Weight = 890.69 gm
Potassium 4.39 % K 5.29 % K2 O
Magnesium 5.46 % Mg 9.05 % MgO
Titanium 5.38 % Ti 8.97 % TiO2
Aluminum 6.06 % Al 11.45 % Al2 O3
Phosphorus 13.91 % P 31.87 % P2 O5
Hydrogen 3.73 % H 33.37 % H2 O
Oxygen 61.07 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
KMg2 Al2 Ti(PO4 )4 (OH)3 •15(H2 O)
Environment:
Replacing minerals in and forming the matrix of sandy layers in lacustrine shale.
IMA Status:
Approved IMA 1984
Locality:
Anloua, near Ngaoundere, Cameroon. Link to MinDat.org Location Data.
Name Origin:
Named for Joseph Mantienne (1929-), Bureau de Recherches G�eologiques et Mini`eres, Orl`eans, France.
Name Pronunciation:
Mantienneite + Pronunciation
Mantienneite Crystallography
Axial Ratios:
a:b:c =0.512:1:0.6056
Cell Dimensions:
a = 10.409, b = 20.33, c = 12.312, Z = 4; V = 2,605.40 Den(Calc)= 2.27
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bca
X Ray Diffraction:
By Intensity(I/Io ): 6.158(1), 3.076(0.6), 10.18(0.4),
Physical Properties of Mantienneite
Cleavage:
{001} Perfect, {010} Indistinct
Color:
Yellow brown.
Density:
2.31
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Hardness:
3 - Calcite
Luster:
Vitreous (Glassy)
Streak:
reddish gray
Optical Properties of Mantienneite
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
Optical Data:
Biaxial (-), a=1.564, g=1.598, bire=0.0340, 2V(Meas)=50-60.
Calculated Properties of Mantienneite
Electron Density:
Bulk Density (Electron Density)=2.32 gm/cc note: Specific Gravity of Mantienneite =2.27 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEMantienneite = 2.32 barns/electronU=PEMantienneite x r electron = 5.38 barns/cc.
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
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
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
References:
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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
Search for Mantienneite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Mantienneite :
Ask about Mantienneite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
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:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.