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 % K2 O
Barium 5.76 % Ba 6.43 % BaO
Sodium 0.32 % Na 0.43 % Na2 O
Titanium 43.50 % Ti 72.57 % TiO2
Aluminum 1.13 % Al 2.14 % Al2 O3
Iron 8.59 % Fe 12.28 % Fe2 O3
Oxygen 35.78 % O
______ ______
100.00 % 99.78 % = TOTAL OXIDE
Empirical Formula:
K0.9 Ba0.3 Na0.1 Ti6.5 Fe3+ 1.1 Al0.3 O16
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 - Dipyramidal H-M Symbol (4/m) Space Group: I 4/m
X Ray Diffraction:
By Intensity(I/Io ): 3.2(1), 5.05(0.7), 7.14(0.7),
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:
PEPriderite = 34.90 barns/electronU=PEPriderite 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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Priderite
(K,Ba)(Ti,Fe+++)8O16
Dana No: 07.09.04.01 Strunz No: 04.DK.05
Locality:
Notes:
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