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Curetonite

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Formula:
Ba(Al,Ti)(PO4)(OH,O)F
System:
Monoclinic
Colour:
Bright green yellowish
Hardness:
Name:
For Forrest (1932-) & Michael Cureton (1960-), who discovered the mineral.
This page provides mineralogical data about Curetonite.

Classification of Curetonite

Approved 1978
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
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Type Occurrence of Curetonite

Year of Discovery:
1978
Geological Setting of Type Material:
Barite deposit

Physical Properties of Curetonite

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

Crystallography of Curetonite

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 Volume:
V 449.20 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Wedgelike
Twinning:
Polysynthetic on {100}

Optical Data of Curetonite

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 Curetonite

Formula:
Ba(Al,Ti)(PO4)(OH,O)F
Essential elements:
All elements listed in formula:

Relationship of Curetonite to other Species

8.BK.05BrazilianiteNaAl3(PO4)2(OH)4
8.BK.10MedenbachiteBi23+Fe3+(Cu,Fe3+)(AsO4)2(OH,O)4
8.BK.10NeustädteliteBi23+Fe3+(Fe3+,Co)(O,OH)4(AsO4)2
8.BK.10CobaltneustädteliteBi23+Fe3+(Co,Fe3+)(O,OH)4(AsO4)2
8.BK.20HeyitePb5Fe22+(VO4)2O4
8.BK.25JamesitePb2Zn(Fe2+,Zn)2Fe43+(AsO4)4(OH)10
8.BK.25LulzaciteSr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10
19.5.1StrontiowhitlockiteSr9Mg(PO4)6(HPO4)
19.5.2Belovite-(Ce)NaCeSr3(PO4)3F
19.5.3GoyaziteSrAl3(PO4)(PO3OH)(OH)6
19.5.4GoedkeniteSr2Al(PO4)2(OH)
19.5.5Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4
19.5.6NabaphiteNaBaPO4 · 9H2O
19.5.7Olgite(Sr,Ba)(Na,Sr,REE)2Na(PO4)2
19.5.8NastrophiteNa(Sr,Ba)PO4 · 9H2O
19.5.9JagoweriteBaAl2(PO4)2(OH)2
19.5.10GorceixiteBaAl3(PO4)(PO3OH)(OH)6
19.5.11PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3
19.5.13Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3
19.5.14KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3
19.5.15PerloffiteBa(Mn2+,Fe2+)2Fe23+(PO4)3(OH)3

Other Names for Curetonite

Name in Other Languages:

Other Information

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 Curetonite

Reference List:
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 Curetonite

Localities for Curetonite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
USA (TL)
 
  • Nevada
    • Humboldt Co.
      • Osgood Mts
        • Potosi District
Min Rec 10:4 pp219-221
Mineral and/or Locality  
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