Priderite Mineral Data

General Priderite Information

Chemical Formula:

(K,Ba)(Ti,Fe+++)8O16

Composition:

Molecular Weight = 715.42 gm

Potassium 4.92 % K 5.92 % K₂O

Barium 5.76 % Ba 6.43 % BaO

Sodium 0.32 % Na 0.43 % Na₂O

Titanium 43.50 % Ti 72.57 % TiO₂

Aluminum 1.13 % Al 2.14 % Al₂O₃

Iron 8.59 % Fe 12.28 % Fe₂O₃

Oxygen 35.78 % O

______ ______

100.00 % 99.78 % = TOTAL OXIDE

Empirical Formula:

K_0.9Ba_0.3Na_0.1Ti_6.5Fe³⁺_1.1Al_0.3O₁₆

Environment:

In some ultrapotassic lamproites, ultramafics and carbonatites.

IMA Status:

Valid Species (Pre-IMA) 1951

Locality:

Wolgidee Hills and the Argyle diamond mine, Kimberley District, Western Australia. Link to MinDat.org Location Data.

Name Origin:

Named for Rex Tregilgas Prider (1910-), Professor of Geology, University of Western Australia.

Name Pronunciation:

Priderite + Pronunciation

Synonym:

ICSD 50764

PDF 6-296

Priderite Image

Images:

Priderite

Comments: Clusters of sub-mm black, opaque crystals of priderite.
Location: Eveslogchorr Mt., Khibiny, Kola, Russia. Scale: 2.5 x 3.4 cm.
© John Veevaert

Priderite Crystallography

Axial Ratios:

a:c = 1:0.29317

Cell Dimensions:

a = 10.11, c = 2.964, Z = 1; V = 302.96 Den(Calc)= 3.92

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4/m

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

By Intensity(I/I_o): 3.2(1), 5.05(0.7), 7.14(0.7),

Crystal Structure:

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Post J E , Von Dreele R B , Buseck P R , Acta Crystallographica, Section B , 38 (1982) p.1056-1065, Symmetry and cation displacements in hollandites:, structure refinements of hollandite, cryptomelane and priderite, Locality: West Kimberley, Australia, Note: Anisotropic displacement factors from ICSD

Physical Properties of Priderite

Cleavage:

{001} Perfect, {hk0} Fair

Color:

Reddish, Reddish black, Black.

Density:

3.86

Diaphaneity:

Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

7 - Quartz

Luster:

Adamantine

Magnetism:

Weakly paramagnetic

Streak:

gray

Optical Properties of Priderite

Dichroism (e):

black or deep reddish brown.

Dichroism (w):

deep reddish brown.

Gladstone-Dale:

CI meas= 0.183 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.196 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2806,KPDmeas= 0.285,KC= 0.349
Ncalc = 2.35 - 2.37

Optical Data:

Uniaxial (-), w=2.1.

Calculated Properties of Priderite

Electron Density:

Bulk Density (Electron Density)=3.65 gm/cc
note: Specific Gravity of Priderite =3.86 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Priderite= 34.90 barns/electron
U=PE_Priderite x r_electron= 127.49 barns/cc.

Radioactivity:

GRapi = 67.14 (Gamma Ray American Petroleum Institute Units)
Concentration of Priderite per GRapi unit = 1.49 (%)

Estimated Radioactivity from Priderite - barely detectable

Priderite Classification

Dana Class:

07.09.04.01 (07)Multiple Oxides

(07.09)Dana Type

(07.09.04)Dana Group

07.09.04.01 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m

07.09.04.02 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m

Strunz Class:

04.DK.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DK -With large (± medium-sized) cations; tunnel structures

04.DK.05 Akaganeite Fe(O,OH,Cl) I2/m 2/m

04.DK.05 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m

04.DK.05 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m

04.DK.05 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m

04.DK.05 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m

04.DK.05 Mannardite BaTi6V2O16•(H2O) I 4₁/a 4/m

04.DK.05 Redledgeite BaTi6Cr2O16•(H2O) I 4₁/a 4/m

04.DK.05 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m

04.DK.05 Henrymeyerite! BaFeTi7O16 I 4/m 4/m

Other Priderite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Priderite :
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

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

Priderite

(K,Ba)(Ti,Fe+++)8O16
Dana No: 07.09.04.01 Strunz No: 04.DK.05
Locality:

Notes: