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Coskrenite-(Ce)

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About Coskrenite-(Ce)Hide

07621860015592386322008.jpg
T.D. Coskren
Formula:
(Ce,Nd,La)2(C2O4)(SO4)2 · 12H2O
Colour:
Usually pale pink under incandescent light, to cream-colored
Lustre:
Vitreous
Specific Gravity:
2.881 (Calculated)
Crystal System:
Triclinic
Name:
Named in honor of T. Dennis Coskren (b. 1942), American geochemist and mineralogist who undertook a study of the minerals at Alum Cave (the type locality).
This page provides mineralogical data about Coskrenite-(Ce).


Classification of Coskrenite-(Ce)Hide

Approved
Approval Year:
1996
First Published:
1999
9/A.01-110
10.AB.65

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
B : Oxalates

Physical Properties of Coskrenite-(Ce)Hide

Vitreous
Transparency:
Transparent
Colour:
Usually pale pink under incandescent light, to cream-colored
Comment:
The pale pink material becomes pale blue under fluorescent lighting.
Streak:
White
Tenacity:
Brittle
Cleavage:
Perfect
{001}
Density:
2.881 g/cm3 (Calculated)

Optical Data of Coskrenite-(Ce)Hide

Type:
Biaxial (-)
RI values:
nα = 1.544(4) nβ = 1.578(4) nγ = 1.602(4)
2V:
Measured: 65° (10), Calculated: 69°
Birefringence:
(r > v), and Z' ^ c = 21 deg
Max Birefringence:
δ = 0.058
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
medium
Pleochroism:
Not Visible

Chemical Properties of Coskrenite-(Ce)Hide

Formula:
(Ce,Nd,La)2(C2O4)(SO4)2 · 12H2O
IMA Formula:
Ce2(SO4)2(C2O4) · 8H2O

Crystallography of Coskrenite-(Ce)Hide

Crystal System:
Triclinic
Morphology:
Aggregates of tabular, wedge-shaped crystals. Individual crystals are up to ~0.7 mm in width and are flattened on {100}, with edges defined by {010} and {001}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005635Coskrenite-(Ce)Peacor D R, Rouse R C, Essene E J, Lauf R J (1999) Coskrenite-(Ce), (Ce,Nd,La)2(SO4)2(C2O4).8H2O, a new rare-earth oxalate mineral from Alum Cave Bluff, Tennessee: Characterization and crystal structure The Canadian Mineralogist 37 1453-14621999Alum Cave Bluff, Tennessee, USA0293
CIF Raw Data - click here to close

Type Occurrence of Coskrenite-(Ce)Hide

General Appearance of Type Material:
Aggregates of tabular, wedge-shaped, euhedral crystals.
Geological Setting of Type Material:
Cave
Reference:
Peacor, D.R., Rouse, R.C., Essene, E.J. (1999) Coskrenite-(Ce), (Ce,Nd,La)2(SO4)2(C2O4)·8H2O, a new rare-earth oxalate mineral from Alum Cave Bluff, Tennessee: characterization and crystal structure. The Canadian Mineralogist: 37: 1453-1462.

Synonyms of Coskrenite-(Ce)Hide

Other Language Names for Coskrenite-(Ce)Hide

Related Minerals - Nickel-Strunz GroupingHide

10.AB.Deveroite-(Ce)Ce2(C2O4)3 · 10H2OMon. 2/m : P21/b
10.AB.XFalottaiteMnC2O4 · 3H2OOrth.
10.AB.Uroxite [(UO2)2(C2O4)(OH)2(H2O)2] · H2OMon. 2/m : P21/b
10.AB.05HumboldtineFe2+(C2O4) · 2H2OMon. 2/m
10.AB.05LindbergiteMn2+(C2O4) · 2H2OMon. 2/m
10.AB.10GlushinskiteMg(C2O4) · 2H2OMon.
10.AB.15MoolooiteCu(C2O4) · 0.4H2OOrth.
10.AB.20StepanoviteNaMgFe3+(C2O4)3 · 8-9H2OTrig. 3m : P3c1
10.AB.25MinguzziteK3Fe3+(C2O4)3 · 3H2OMon. 2/m : P21/b
10.AB.30WheatleyiteNa2Cu(C2O4)2 · 2H2OTric.
10.AB.35ZhemchuzhnikoviteNaMgAl(C2O4)3 · 8H2OTrig. 3m : P3c1
10.AB.40WeddelliteCa(C2O4) · (2.5-x)H2OTet. 4/m : I4/m
10.AB.45WhewelliteCa(C2O4) · H2OMon. 2/m : P21/b
10.AB.50CaoxiteCa(C2O4) · 3H2OTric.
10.AB.55Oxammite(NH4)2(C2O4) · H2OOrth. 2 2 2 : P21 21 2
10.AB.60NatroxalateNa2(C2O4)Mon.
10.AB.70Levinsonite-(Y)(Y,Nd,La)Al(C2O4)(SO4)2 · 12H2OMon. 2/m
10.AB.75Zugshunstite-(Ce)(Ce,Nd,La)Al(C2O4)(SO4)2 · 12H2OMon.
10.AB.80NovgorodovaiteCa2(C2O4)Cl2 · 2H2OMon. 2/m

Fluorescence of Coskrenite-(Ce)Hide

None observed

Other InformationHide

Notes:
Readily soluble in water.
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 Coskrenite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Peacor, D.R., Rouse, R.C., Essene, E.J. (1999) Coskrenite-(Ce), (Ce,Nd,La)2(SO4)2(C2O4)·8H2O, a new rare-earth oxalate mineral from Alum Cave Bluff, Tennessee: characterization and crystal structure. The Canadian Mineralogist: 37: 1453-1462.
Jambor, J.L., Grew, E.S., Roberts, A.C. (2000) New mineral names. American Mineralogist: 85: 1561-1565.
Echigo, T., Kimata, M. (2010) Crystal chemistry and genesis of organic minerals: A review of oxalate and polycyclic aromatic hydrocarbon minerals. The Canadian Mineralogist: 48: 1329-1358.
Piro, O.E., Baran, E.J. (2018) Crystal chemistry of organic minerals-salts of organic acids: the synthetic approach. Crystallography Reviews: 24: 149-175.

Internet Links for Coskrenite-(Ce)Hide

Localities for Coskrenite-(Ce)Hide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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)
 
  • Tennessee
    • Sevier Co.
Canadian Mineralogist (1999) 37, 1453-1462
 
Mineral and/or Locality  
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