Mitryaevaite Mineral Data

Mitryaevaite Mineral Data +

General Mitryaevaite Information

Chemical Formula:

Al5[(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8·6.48(H2O)

Composition:

Molecular Weight = 850.59 gm

Aluminum 15.86 % Al 29.97 % Al₂O₃

Phosphorus 12.75 % P 29.20 % P₂O₅

Hydrogen 3.91 % H 34.95 % H₂O

Sulfur 1.88 % S

Oxygen 61.13 % O

Fluorine 4.47 % F 4.47 % F

- % F -1.88 % -O=F₂

______ ______

100.00 % 96.70 % = TOTAL OXIDE

Empirical Formula:

Al₅(PO₄)₂(PO₃OH)_1.5(SO3OH)_0.5F₂(OH)₂(H₂O)₈·6.5(H₂O)

Environment:

In vanadium-bearing black shales in a Cambrian carbonaceous chert formation.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

Northwestern Karatau Range and Zhabagly Mountains, southern Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

For Dr. Nonna Mikhailovna Mitryaeva (1920-) in recognition of her contributions to the mineralogy of Kazakhstan.

Synonym:

IMA1991-035

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Mitryaevaite Crystallography

Axial Ratios:

a:b:c =0.6831:1:1.0166

Cell Dimensions:

a = 6.918, b = 10.127, c = 10.296, Z = 1; alpha = 77.036°, beta = 73.989°, gamma = 76.272° V = 656.37 Den(Calc)= 2.15

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 9.75(1), 6.35(0.3), 9.24(0.2),

Crystal Structure:

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Cahill C L , Krivovichev S V , Burns P C , Bekenova G K , Shabanova T A , The Canadian Mineralogist , 39 (2001) p.179-186, The crystal structure of mitryaevaite, Al5(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8*6.48H2O,, determined from a microcrystal using synchrotron radiation

Physical Properties of Mitryaevaite

Cleavage:

[001] Perfect, [010] Perfect, [100] Good

Color:

Colorless, White.

Density:

2.02 - 2.03, Average = 2.02

Diaphaniety:

Transparent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Habit:

Pulverulent - Forms a loose, poorly-coherent powdery mass.

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Mitryaevaite

Gladstone-Dale:

CI meas= -0.064 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.237,KPDmeas= 0.2516,KC= 0.2364

Optical Data:

Biaxial (+), a=1.504, g=1.515, bire=0.0110

Calculated Properties of Mitryaevaite

Electron Density:

r_electron=2.21 gm/cc
note: r_Mitryaevaite=2.15 gm/cc.

Fermion Index

Fermion Index = 0.00044
Boson Index = 0.99956

Photoelectric:

PE_Mitryaevaite= 1.29 barns/electron
U=PE_Mitryaevaite x r_electron= 2.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Mitryaevaite is Not Radioactive

Mitryaevaite Classification

Dana Class:

43.5.21.1 (43)Compound Phosphates, etc.

(43.5)(Hydrated Compound Anions With Hydroxyl or Halogen)

(43.5.21)Dana Group

43.5.21.1 Mitryaevaite ! Al5[(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8·6.48(H2O) P1 1

Strunz Class:

VII/D.12-03 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.12 - Sasaite - Kribergite ? Series

VII/D.12-03 Mitryaevaite Al5[(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8·6.48(H2O) P1 1

VII/D.12-05 Sasaite (Al,Fe)14(PO4)11(SO4)(OH)7·84(H2O) P 222 or Pmm2 or P mmm Ortho

VII/D.12-10 Vashegyite Al11(PO4)9(OH)6·38(H2O)orAl6(PO4)5(OH)3·23(H2O) Pna2 or P na2₁ mm2

VII/D.12-20 Vantasselite Al4(PO4)3(OH)3·9(H2O) Pma2,P 2₁am,Pmam Ortho

VII/D.12-30 Sanjuanite Al2(PO4)(SO4)(OH)·9(H2O) P1 or P1 Tri

VII/D.12-40 Kribergite Al5(PO4)3(SO4)(OH)4·4(H2O) P1 or P1 Tri

Other Mitryaevaite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,V84,p1994-1999,V86, p 1115) OPTIC PROP.(Am.Min.,Vol.84,p194,1999)

See Also:

Links to other databases for Mitryaevaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Mitryaevaite

Al5[(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8·6.48(H2O)
Dana No: 43.5.21.1 Strunz No: VII/D.12-03
Locality:

Notes: