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Curetonite

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About CuretoniteHide

Formula:
Ba(Al,Ti)(PO4)(OH,O)F
Colour:
Bright green yellowish
Hardness:
Specific Gravity:
4.42
Crystal System:
Monoclinic
Name:
Named in honor of Forrest Ellsworth Cureton II (21 April 1932, Willits, California, USA - ), mineral dealer, and his son Michael Cureton (1960-). They discovered the mineral.
This page provides mineralogical data about Curetonite.


Classification of CuretoniteHide

Approved
Approval Year:
1978
First Published:
1979
8.BK.15

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
K : With medium-sized and large cations, (OH, etc.):RO4 = 2:1, 2.5:1
41.5.15.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
19.5.12

19 : Phosphates
5 : Phosphates of Sr and Ba

Physical Properties of CuretoniteHide

Transparency:
Translucent
Colour:
Bright green yellowish
Streak:
White
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {011}
Parting:
On {010}
Density:
4.42(5) g/cm3 (Measured)    4.31 g/cm3 (Calculated)

Optical Data of CuretoniteHide

Type:
Biaxial (+)
RI values:
nα = 1.676 nβ = 1.680 nγ = 1.693
2V:
Measured: 60° , Calculated: 58.4°
Max Birefringence:
δ = 0.017
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak r < v
Pleochroism:
Visible
Comments:
In patchy yellows

Chemical Properties of CuretoniteHide

Formula:
Ba(Al,Ti)(PO4)(OH,O)F

Crystallography of CuretoniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 6.977(2) Å, b = 12.564(4) Å, c = 5.223(1) Å
β = 101.15(2)°
Ratio:
a:b:c = 0.555 : 1 : 0.416
Unit Cell V:
449.20 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Wedgelike
Twinning:
Polysynthetic on {100}

Type Occurrence of CuretoniteHide

Geological Setting of Type Material:
Barite deposit
Reference:
Williams, S. A. (1979) Curetonite a new phosphate from Nevada. Mineralogical Record: 10: 219-220.

Synonyms of CuretoniteHide

Other Language Names for CuretoniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Quartz1 photo of Curetonite associated with Quartz on mindat.org.
Evansite1 photo of Curetonite associated with Evansite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.BK.05BrazilianiteNaAl3(PO4)2(OH)4Mon. 2/m : P2/b
8.BK.10MedenbachiteBi2Fe3+Cu2+(AsO4)2O(OH)3Tric. 1 : P1
8.BK.10NeustädteliteBi2Fe3+(Fe3+,Co)(AsO4)2(O,OH)4Tric. 1 : P1
8.BK.10CobaltneustädteliteBi2Fe3+(Co,Fe3+)(AsO4)2(O,OH)4Tric. 1 : P1
8.BK.20HeyitePb5Fe2+2(VO4)2O4Mon.
8.BK.25JamesitePb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10Tric.
8.BK.25LulzaciteSr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10Tric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.5.1StrontiowhitlockiteSr9Mg(PO4)6(HPO4)Trig. 3m : R3c
19.5.2Belovite-(Ce)NaCeSr3(PO4)3FTrig. 3 : P3
19.5.3GoyaziteSrAl3(PO4)(PO3OH)(OH)6Trig. 3m (3 2/m) : R3m
19.5.4GoedkeniteSr2Al(PO4)2(OH)Mon. 2/m : P21/m
19.5.5Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4Orth.
19.5.6NabaphiteNaBaPO4 · 9H2OIso.
19.5.7Olgite(Sr,Ba)(Na,Sr,REE)2Na(PO4)2Trig. 3m (3 2/m) : P3m1
19.5.8NastrophiteNa(Sr,Ba)PO4 · 9H2O
19.5.9JagoweriteBaAl2(PO4)2(OH)2Tric.
19.5.10GorceixiteBaAl3(PO4)(PO3OH)(OH)6Mon. m : Bm
19.5.11PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3Mon. 2/m : P21/m
19.5.13Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3Mon.
19.5.14KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3Mon.
19.5.15PerloffiteBa(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for CuretoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Williams, S. A. (1979) Curetonite a new phosphate from Nevada. Mineralogical Record: 10: 219-220.
American Mineralogist: 65: 206.
American Mineralogist: 79: 545-549.

Internet Links for CuretoniteHide

Localities for CuretoniteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Nevada
    • Humboldt Co.
      • Osgood Mts
        • Potosi District
Min Rec 10:4 pp219-221
Mineral and/or Locality  
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