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Stercorite

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Formula:
Na(NH4)HPO4 · 4H2O
System:
Triclinic
Colour:
Colourless (artificial ...
Hardness:
2
Name:
From Latin "Stercus", dung, alluding to its discovery in guano.
This page provides mineralogical data about Stercorite.

Classification of Stercorite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
8.CJ.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
39.3.1.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
19.1.6

19 : Phosphates
1 : Phosphates of the alkali metals
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http://www.mindat.org/min-3765.html
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First Recorded Occurrence of Stercorite

Year of Discovery:
1850

Physical Properties of Stercorite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Colourless (artificial material); white, pale yellow, brownish; colourless in transmitted light.
Hardness (Mohs):
2
Cleavage:
None Observed
Density:
1.615 g/cm3 (Measured)    
Comment:
1.574 (artificial material).

Crystallography of Stercorite

Crystal System:
Triclinic
Cell Parameters:
a = 6.92Å, b = 10.61Å, c = 6.43Å
α = 98.29°, β = 90.42°, γ = 71.16°
Ratio:
a:b:c = 0.652 : 1 : 0.606
Morphology:
Crystals short prismatic (artificial); Pseudo-monoclinc. Crystalline masses and nodules (natural).
Twinning:
Repeated twinning of triclinic individuals on {010} simulates monoclinic symmetry. Reentrant angles are usually lacking.

Optical Data of Stercorite

Type:
Biaxial (+)
RI values:
nα = 1.439 nβ = 1.442 nγ = 1.469
2V:
Measured: 35° , Calculated: 38°
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
dispersion not observed

Chemical Properties of Stercorite

Formula:
Na(NH4)HPO4 · 4H2O
Essential elements:
All elements listed in formula:

Relationship of Stercorite to other Species

8.CJ.10Mundrabillaite(NH4)2Ca(HPO4)2 · H2O
8.CJ.10Swaknoite(NH4)2Ca(HPO4)2 · H2O
8.CJ.15NabaphiteNaBaPO4 · 9H2O
8.CJ.15NastrophiteNa(Sr,Ba)PO4 · 9H2O
8.CJ.20HaidingeriteCaHAsO4 · H2O
8.CJ.25VladimiriteCa4(AsO4)2(AsO3OH) · 4H2O
8.CJ.30FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2O
8.CJ.35Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O
8.CJ.40PhaunouxiteCa3(AsO4)2 · 11H2O
8.CJ.40RauenthaliteCa3(AsO4)2 · 10H2O
8.CJ.45Brockite(Ca,Th,Ce)PO4 · H2O
8.CJ.45Grayite(Th,Pb,Ca)(PO4) · H2O
8.CJ.45Rhabdophane-(Ce)(Ce,La)(PO4) · H2O
8.CJ.45Rhabdophane-(La)(La,Ce)(PO4) · H2O
8.CJ.45Rhabdophane-(Nd)(Nd,Ce,La)(PO4) · H2O
8.CJ.45Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2O
8.CJ.45SmirnovskiteCaTh(PO4)2 · nH2O
8.CJ.50ArdealiteCa2(HPO4)(SO4) · 4H2O
8.CJ.50BrushiteCa(HPO4) · 2H2O
8.CJ.50Churchite-(Y)Y(PO4) · 2H2O
8.CJ.50PharmacoliteCa(HAsO4) · 2H2O
8.CJ.50Churchite-(Nd)Nd(PO4) · 2H2O
8.CJ.55McneariteNaCa5(AsO4)(HAsO4)4 · 4H2O
8.CJ.60DorfmaniteNa2HPO4 · 2H2O
8.CJ.65SincositeCa(VO)2(PO4)2 · 5H2O
8.CJ.65BariosincositeBa(VO)2(PO4)2 · 4H2O
8.CJ.70CatalanoiteNa2(HPO4) · 8H2O
8.CJ.75GuériniteCa5(AsO4)2(HAsO4)2 · 9H2O
8.CJ.85NingyoiteCaU(PO4)2 · 1-2H2O
19.1.1LithiophosphateLi3PO4
19.1.2OlympiteNa5Li(PO4)2
19.1.3NahpoiteNa2HPO4
19.1.4DorfmaniteNa2HPO4 · 2H2O
19.1.5NalipoiteNaLi2PO4
19.1.7Archerite(K,NH4)(H2PO4)
19.1.8Biphosphammite(NH4,K)(H2PO4)
19.1.9Phosphammite(NH4)2(HPO4)
19.1.10LithiophiliteLiMn2+PO4
19.1.11SickleriteLi1-x(Mnx3+Mn2+1-x)PO4
19.1.12FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
19.1.13TriphyliteLiFe2+PO4
19.1.14TavoriteLiFe3+(PO4)(OH)
19.1.15MarićiteNaFe2+(PO4)

Other Names for Stercorite

Name in Other Languages:

Other Information

Other Information:
Melting point 79°. 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 Stercorite

Reference List:
Herapath (1850) Quarterly Journal of the Chemical Society, London: 2: 70.

Schaschek (1914) Mineralogische und petrographische Mitteilungen, Vienna: 32: 402.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 698-699.

Acta Crystallographica (1974): B30: 504.

Internet Links for Stercorite

Localities for Stercorite

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.
Antarctica
AmMin 36:361-367
Australia
 
  • Victoria
    • Corangamite Shire
      • Skipton
        • Mt. Widderin (Anderson's Hill)
  • Western Australia
    • Dundas Shire
      • Madura Roadhouse
Mineralogical Magazine (1977): 41: 33-35.
Chile
 
  • Tarapacá Region
    • Iquique Province
      • Iquique
        • Puerta Patillos
http://forum.amiminerals.org/viewtopic.php?t=3756&highlight=patache
Namibia
 
  • Karas Region
    • Lüderitz District
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 699; Anthony, J.W. , R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. IV (2000)
Peru
 
  • La Libertad Department
    • Trujillo Province
      • Virù
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 699.
Mineral and/or Locality  
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