Tinticite Mineral Data

Tinticite Mineral Data +

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General Tinticite Information

Chemical Formula:

Fe+++5(PO4,VO4)4·7(H2O)

Composition:

Molecular Weight = 772.21 gm

Vanadium 2.51 % V 4.48 % V₂O₅

Iron 38.62 % Fe 55.22 % Fe₂O₃

Phosphorus 13.08 % P 29.96 % P₂O₅

Hydrogen 1.75 % H 15.63 % H₂O

Oxygen 44.05 % O

______ ______

100.00 % 105.28 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺_5.34(PO₄)_3.26(VO₄)_0.38·6.7(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1946

Locality:

Tintic Standard mine, Tintic district, Utah Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Tinticite Image

Images:

Tinticite

Comments: Porcelaneous tinticite chip.
Location: Near Tintic Standard Mine, Tintic District, Juab County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tinticite Crystallography

Axial Ratios:

a:b:c =0.7965:1:0.7644

Cell Dimensions:

a = 7.965, b = 9.999, c = 7.644, Z = 1; alpha = 103.94°, beta = 115.91°, gamma = 67.86° V = 492.28 Den(Calc)= 2.60

Crystal System:

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

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

By Intensity(I/I_o): 3.307(1), 3.027(0.95), 3.9504(0.95),

Crystal Structure:

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Rius J , Louer D , Louer M , Gali S , Melgarejo J C , European Journal of Mineralogy , 12 (2000) p.581-588, Structure solution from powder data of the phosphate hydrate tinticite

Physical Properties of Tinticite

Color:

White, Light brown, Pale yellowish green.

Density:

2.8 - 2.94, Average = 2.87

Habit:

Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Hardness:

2.5 - Finger Nail

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Tinticite

Gladstone-Dale:

CI meas= 0.126 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2866,KPDmeas= 0.2597,KC= 0.2971

Optical Data:

Biaxial (?), a=1.745, g=1.7455, bire=0.0005

Calculated Properties of Tinticite

Electron Density:

r_electron=2.56 gm/cc
note: r_Tinticite=2.60 gm/cc.

Fermion Index

Fermion Index = 0.00846
Boson Index = 0.99154

Photoelectric:

PE_Tinticite= 12.55 barns/electron
U=PE_Tinticite x r_electron= 32.11 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tinticite is Not Radioactive

Tinticite Classification

Dana Class:

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

(42.12)with miscellaneous formulae

(42.12.4)Dana Group

42.12.4.1 Tinticite Fe5(PO4,VO4)4·7(H2O) P1 1

Strunz Class:

VII/D.11-60 VII - Phosphates, Arsenates and Vanadates

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

VII/D.11 - Strunzite series

VII/D.11-10 Ferrostrunzite FeFe2(PO4)2(OH)2·6(H2O) P 1,P1 Tri

VII/D.11-20 Strunzite MnFe2(PO4)2(OH)2·6(H2O) P1 1

VII/D.11-30 Ferristrunzite FeFe2(PO4)2(OH)3·5(H2O) P1,P 1 Tri

VII/D.11-40 Bermanite MnMn2(PO4)2(OH)2·4(H2O) P 2₁ 2

VII/D.11-50 Cacoxenite (Fe,Al)25(PO4)17O6(OH)12·75(H2O) P 6/mmm 6/m 2/m 2/m

VII/D.11-60 Tinticite Fe5(PO4,VO4)4·7(H2O) P1 1

VII/D.11-70 Beraunite FeFe5(PO4)4(OH)5·4(H2O) C 2/c 2/m

VII/D.11-71 Oxiberaunite* (Fe,Mn)Fe5(PO4)4O(OH)4·6(H2O) Mono

VII/D.11-90 Souzalite (Mg,Fe)3(Al,Fe)4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

VII/D.11-100 Gormanite Fe3Al4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

VII/D.11-110 Dufrenite FeFe4(PO4)3(OH)5·2(H2O) C 2/c 2/m

VII/D.11-120 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12·4(H2O) C 2/c 2/m

VII/D.11-130 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6·2(H2O) C 2/c 2/m

VII/D.11-135 Ercitite! Na(Mn,Fe)(PO4)(OH)·2(H2O) P 2₁/n 2/m

VII/D.11-140 Kidwellite Na(Fe,Cu)9x(PO4)6(OH)11·3(H2O) P 2/c 2/m

VII/D.11-150 Meurigite! KFe7(PO4)5(OH)7·8(H2O) C 2,Cm,C 2/m Mono

Other Tinticite Information

References:

NAME( Dana8) PHYS. PROP.(AmMin, v 86, p 379) OPTIC PROP.(Dana8)

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Tinticite

Fe+++5(PO4,VO4)4·7(H2O)
Dana No: 42.12.4.1 Strunz No: VII/D.11-60
Locality:

Notes: