Mitridatite Mineral Data

General Mitridatite Information

Chemical Formula:

Ca2Fe+++3(PO4)3O2•3(H2O)

Composition:

Molecular Weight = 634.66 gm

Calcium 12.63 % Ca 17.67 % CaO

Iron 26.40 % Fe 37.74 % Fe₂O₃

Phosphorus 14.64 % P 33.55 % P₂O₅

Hydrogen 0.95 % H 8.52 % H₂O

Oxygen 45.38 % O

______ ______

100.00 % 97.48 % = TOTAL OXIDE

Empirical Formula:

Ca₂Fe³⁺₃(PO₄)₃O₃•3(H₂O)

Environment:

Sedimentary oolitic iron ores.

IMA Status:

Valid Species (Pre-IMA) 1914

Locality:

Mithridat Hill, Kerch, Crimea, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Mitridatite + Pronunciation

Synonym:

ICSD 1017

PDF 26-1057

Mitridatite Image

Images:

Mitridatite

Comments: Dark brown crystals of mitridatite on whitlockite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Mitridatite Crystallography

Axial Ratios:

a:b:c =0.9054:1:0.5813

Cell Dimensions:

a = 17.52, b = 19.35, c = 11.25, Z = 12; beta = 95.92° V = 3,793.55 Den(Calc)= 3.33

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/a

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

By Intensity(I/I_o): 8.64(1), 2.721(0.7), 5.55(0.6),

Crystal Structure:

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Moore P B , Araki T , Inorganic Chemistry , 16 (1977) p.1096-1106, Mitridatite, Ca6(H2O)6[FeIII9O6(PO4)9]·3H2O., A noteworthy octahedral sheet structure, Locality: White Elephant pegmatite, Custer, South Dakota, USA

Physical Properties of Mitridatite

Cleavage:

{100} Good

Color:

Bronze red, Brown green, Green, Greenish yellow, Yellow brown.

Density:

3.24

Diaphaneity:

Translucent to Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Hardness:

3.5 - Copper Penny

Luster:

Adamantine - Resinous

Streak:

olive green

Optical Properties of Mitridatite

Gladstone-Dale:

CI meas= -0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2487,KPDmeas= 0.2557,KC= 0.2463
Ncalc = 1.8 - 1.82

Optical Data:

Biaxial (-), a=1.785, b=1.85, g=1.85, bire=0.0650, 2V(Calc)=0, 2V(Meas)=5-10.

Calculated Properties of Mitridatite

Electron Density:

Bulk Density (Electron Density)=3.28 gm/cc
note: Specific Gravity of Mitridatite =3.33 gm/cc.

Fermion Index:

Fermion Index = 0.0059862776
Boson Index = 0.9940137224

Photoelectric:

PE_Mitridatite= 10.10 barns/electron
U=PE_Mitridatite x rElectron Density= 33.16 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mitridatite is Not Radioactive

Mitridatite Classification

Dana Class:

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

(42.08)where (AB)7 (XO4)4 Zq · x(H2O)

(42.08.04)Mitridatite Group

42.08.04.01 Mitridatite Ca2Fe3(PO4)3O2•3(H2O) A2/a 2/m

42.08.04.02 Robertsite Ca6Mn9(PO4)9O6(H2O)6•3(H2O) A2/a 2/m

42.08.04.03 Arseniosiderite Ca2Fe3(AsO4)3O2•3(H2O) A2/a 2/m

Strunz Class:

08.DH.30 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1

08.DH.30 Arseniosiderite Ca2Fe3(AsO4)3O2•3(H2O) A2/a 2/m

08.DH.30 Pararobertsite Ca2Mn3(PO4)3O2•3(H2O) P 2₁/c 2/m

08.DH.30 Kolfanite Ca2Fe3O2(AsO4)3•2(H2O) A2/a 2/m

08.DH.30 Lunokite (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m

08.DH.30 Robertsite Ca6Mn9(PO4)9O6(H2O)6•3(H2O) A2/a 2/m

08.DH.30 Mitridatite Ca2Fe3(PO4)3O2•3(H2O) A2/a 2/m

08.DH.30 Sailaufite! Ca2Mn3O2(AsO4)2(CO3)•3(H2O) Cm m

Other Mitridatite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Mitridatite :
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

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Ask about Mitridatite here :
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Print or Cut-and-Paste your Mitridatite Specimen Label here :

Mitridatite

Ca2Fe+++3(PO4)3O2•3(H2O)
Dana No: 42.08.04.01 Strunz No: 08.DH.30
Locality:

Notes: