Mineralogy Database

Curetonite Mineral Data

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General Curetonite Information

Help on Chemical  Formula: Chemical Formula: Ba4Al3Ti(PO4)4(O,OH)6
Help on Composition: Composition: Molecular Weight = 1,160.06 gm
   Barium      47.35 %  Ba   52.87 % BaO
   Titanium     4.13 %  Ti    6.89 % TiO2
   Aluminum     6.98 %  Al   13.18 % Al2O3
   Phosphorus  10.68 %  P    24.47 % P2O5
   Hydrogen     0.52 %  H     4.66 % H2O
   Oxygen      30.34 %  O
              ______        ______ 
              100.00 %      102.07 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba4Al3Ti(PO4)4(OH)6
Help on Environment: Environment: Massive barite in phosphatic, black organic cherts and shales is cut by veins of coarse-grained barite, euhedral adularia, and curetonite.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Barite Mine at Golconda, Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Forrest Cureton, mineralogist, and Michael Cureton, of Tucson, AZ, who found the mineral.
Help on Synonym: Synonym: ICSD 75287
  PDF 33-134

Curetonite Image

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Comments: Translucent tabular crystal of curetonite in crystalline barite.
Location: Near Golconda, Humboldt County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Curetonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5543:1:0.4159
Help on Cell Dimensions: Cell Dimensions: a = 6.957, b = 12.55, c = 5.22, Z = 1; beta = 102.15° V = 445.55 Den(Calc)= 4.32
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.23(1), 3.286(0.8), 1.687(0.7),2.2(0.6), 2.25(0.6), 2.82(0.6), 2.99(0.6), 4.29(0.5),

Physical Properties of Curetonite

Help on Cleavage: Cleavage: {011} Good, {010} Parting
Help on Color: Color: Bright yellowish green, Nickel green.
Help on Density: Density: 4.31
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Curetonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.132 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.134 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1581,KPDmeas= 0.1585,KC= 0.1826
Ncalc = 1.79
Help on Optical Data: Optical Data: Biaxial (+), a=1.676, b=1.68, g=1.693, bire=0.0170, 2V(Calc)=60, 2V(Meas)=60. Dispersion weak, r < v.
Help on Pleochroism (x): Pleochroism (x): yellow.
Help on Pleochroism (y): Pleochroism (y): yellow.
Help on Pleochroism (z): Pleochroism (z): yellow.

Calculated Properties of Curetonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.92 gm/cc
note: Specific Gravity of Curetonite =4.31 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PECuretonite = 210.40 barns/electron
U=PECuretonite x rElectron Density= 823.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Curetonite is Not Radioactive

Curetonite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.15)Dana Group Curetonite Ba4Al3Ti(PO4)4(O,OH)6 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 08.BK.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BK -With medium-sized and large cations, (OH, etc.)
08.BK.15 Curetonite Ba4Al3Ti(PO4)4(O,OH)6 P 21/n 2/m

Other Curetonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Curetonite :
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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Dana No: Strunz No: 08.BK.15





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