Stercorite Mineral Data

General Stercorite Information

Chemical Formula:

H(NH4)Na(PO4)•4(H2O)

Composition:

Molecular Weight = 209.07 gm

Sodium 11.00 % Na 14.82 % Na₂O

Phosphorus 14.82 % P 33.95 % P₂O₅

Hydrogen 1.93 % H - % Calc as (NH₄)₂O

Hydrogen 4.34 % H 38.78 % H₂O

Nitrogen 6.70 % N 12.45 % (NH₄)₂O

Oxygen 61.22 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

H(NH₄)Na(PO₄)•4(H₂O)

Environment:

Bird and bat guano deposits.

IMA Status:

Valid Species (Pre-IMA) 1850

Locality:

Ichaboe Island, northwest of L�uderitz, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named from the Latin for dung.

Name Pronunciation:

Stercorite + Pronunciation

Synonym:

ICSD 2036

PDF 24-1048

Stercorite Crystallography

Axial Ratios:

a:b:c =0.6519:1:0.6064

Cell Dimensions:

a = 6.921, b = 10.616, c = 6.438, Z = 2; alpha = 98.29°, beta = 90.42°, gamma = 71.16° V = 442.99 Den(Calc)= 1.57

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.53(1), 9.93(0.95), 4.24(0.55),

Physical Properties of Stercorite

Cleavage:

None

Color:

Colorless, White, Yellowish, Brownish.

Density:

1.554

Diaphaneity:

Transparent

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Stercorite

Gladstone-Dale:

CI meas= -0.304 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.29 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2866,KPDmeas= 0.2896,KC= 0.2221
Ncalc = 1.35

Optical Data:

Biaxial (+), a=1.439, b=1.442, g=1.469, bire=0.0300, 2V(Calc)=38, 2V(Meas)=35.567.

Calculated Properties of Stercorite

Electron Density:

Bulk Density (Electron Density)=1.65 gm/cc
note: Specific Gravity of Stercorite =1.57 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Stercorite= 1.00 barns/electron
U=PE_Stercorite x rElectron Density= 1.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stercorite is Not Radioactive

Stercorite Classification

Dana Class:

39.03.01.01 (39)Hydrated Acid Phosphates, etc

(39.03)with miscellaneous formulae

(39.03.01)Dana Group

39.03.01.01 Stercorite H(NH4)Na(PO4)•4(H2O) P1 1

Strunz Class:

08.CJ.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CJ -With only large cations

08.CJ.05 Stercorite H(NH4)Na(PO4)•4(H2O) P1 1

Other Stercorite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Stercorite :
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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Stercorite Specimen Label here :

Stercorite

H(NH4)Na(PO4)•4(H2O)
Dana No: 39.03.01.01 Strunz No: 08.CJ.05
Locality:

Notes:

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