Mantienneite Mineral Data

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 % 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

Empirical Formula:

KMg₂Al₂Ti(PO₄)₄(OH)₃·15(H₂O)

IMA Status:

Approved IMA 1984

Locality:

Link to MinDat.org Location Data.

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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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P bca

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

Optical Data:

Biaxial (-), a=1.564, g=1.598, bire=0.0340, 2V(Meas)=50-60.

Calculated Properties of Mantienneite

Electron Density:

r_electron=2.32 gm/cc
note: r_Mantienneite=2.27 gm/cc.

Fermion Index

Fermion Index = 0.01271
Boson Index = 0.98729

Photoelectric:

PE_Mantienneite= 2.32 barns/electron
U=PE_Mantienneite x r_electron= 5.38 barns/cc.

Radioactivity:

GRapi = 64.85 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Mantienneite - barely detectable

Mantienneite Classification

Dana Class:

42.11.21.2 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.11)where (AB)4 (XO4)3 Zq · x(H2O)

(42.11.21)Dana Group

42.11.21.1 Paulkerrite K(Mg,Mn)2(Fe,Al)2Ti(PO4)4(OH)3·15(H2O) P bca 2/m 2/m 2/m

42.11.21.2 Mantienneite KMg2Al2Ti(PO4)4(OH)3·15(H2O) P bca 2/m 2/m 2/m

42.11.21.3 Matveevite? KTiMn2Fe2(PO4)4(OH)3·15(H2O) Pnam ro P na2₁ Ortho

42.11.21.4 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:

VII/D.33-10 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K

VII/D.33 - Montgomeryite group, Mantienneite - Benyacarite series

VII/D.33-10 Mantienneite KMg2Al2Ti(PO4)4(OH)3·15(H2O) P bca 2/m 2/m 2/m

VII/D.33-20 Paulkerrite K(Mg,Mn)2(Fe,Al)2Ti(PO4)4(OH)3·15(H2O) P bca 2/m 2/m 2/m

VII/D.33-30 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

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Mantienneite

KMg2Al2Ti(PO4)4(OH)3·15(H2O)
Dana No: 42.11.21.2 Strunz No: VII/D.33-10
Locality:

Notes: