Oxammite Mineral Data
General Oxammite Information
Chemical Formula:
(NH4)2(C2O4)•(H2O)
Composition:
Molecular Weight = 142.11 gm
Hydrogen 5.67 % H - % Calc as (NH4 )2 O
Hydrogen 1.42 % H 12.68 % H2 O
Carbon 16.90 % C 50.68 % C2 O3
Nitrogen 19.71 % N 36.64 % (NH4 )2 O
Oxygen 56.29 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
(NH4 )2 (C2 O4 )•(H2 O)
Environment:
Derived from bird or bat guano; in subfossil bird eggs and on subfossil birds.
IMA Status:
Valid Species (Pre-IMA) 1870
Locality:
Guanape Islands, south of Trujillo, Peru. Link to MinDat.org Location Data.
Name Origin:
Named as an OXalate of AMMonia.
Name Pronunciation:
Oxammite
Synonym:
ICSD 64936
PDF 14-801
Oxammite Image
Images:
Oxammite Crystallography
Axial Ratios:
a:b:c =0.7793:1:0.3686
Cell Dimensions:
a = 8.035, b = 10.31, c = 3.801, Z = 2; V = 314.88 Den(Calc)= 1.50
Crystal System:
Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 21 21 2
X Ray Diffraction:
By Intensity(I/Io ): 2.666(1), 3.057(0.95), 6.32(0.95),
Physical Properties of Oxammite
Cleavage:
{001} Distinct
Color:
Colorless, Yellowish white.
Density:
1.5
Diaphaneity:
Transparent
Hardness:
2.5 - Finger Nail
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Oxammite
Gladstone-Dale:
CI meas = -7.146 (Poor) - where the CI = (1-KPDmeas /KC ) CI calc = -7.146 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.3511,KPDmeas = 0.3511,KC = 0.0431 Ncalc = 1.06
Optical Data:
Biaxial (-), a=1.438, b=1.547, g=1.595, bire=0.1570, 2V(Calc)=62, 2V(Meas)=62.
Calculated Properties of Oxammite
Electron Density:
Bulk Density (Electron Density)=1.60 gm/cc note: Specific Gravity of Oxammite =1.50 gm/cc.
Fermion Index:
Fermion Index = 0.19 Boson Index = 0.81
Photoelectric:
PEOxammite = 0.31 barns/electronU=PEOxammite x r Electron Density= 0.50 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Oxammite is Not Radioactive
Oxammite Classification
Dana Class:
50.01.05.01 (50) Salts of Organic Acids
(50.01) (Oxalates)
(50.01.05) Dana Group
50.01.05.01 Oxammite (NH4)2(C2O4)•(H2O) P 21 21 2 2 2 2
Strunz Class:
10.AB.55 10 - ORGANIC COMPOUNDS
10.A - Salts of Organic Acids
10.AB -Oxalates
10.AB.55 Oxammite (NH4)2(C2O4)•(H2O) P 21 21 2 2 2 2
Other Oxammite Information
References:
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Oxammite :
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
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Oxammite
(NH4)2(C2O4)•(H2O)
Dana No: 50.01.05.01 Strunz No: 10.AB.55
Locality:
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