Phosphammite Mineral Data
General Phosphammite Information
Chemical Formula:
(NH4)2HPO4
Composition:
Molecular Weight = 132.06 gm
Phosphorus 23.45 % P 53.74 % P2 O5
Hydrogen 6.11 % H - % Calc as (NH4 )2 O
Hydrogen 0.76 % H 6.82 % H2 O
Nitrogen 21.21 % N 39.43 % (NH4 )2 O
Oxygen 48.46 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
(NH4 )2 (HPO4 )
Environment:
Probably a crystallization product of the liquid fraction of guano.
IMA Status:
Valid Species (Pre-IMA) 1870
Locality:
In Toppin Hill Cave, about 320 km northeast of Kalgoorlie, Western Australia. Link to MinDat.org Location Data.
Name Origin:
Named as a PHOSPHate of AMMonium.
Name Pronunciation:
Phosphammite + Pronunciation
Synonym:
ICSD 2799
PDF 29-111
Phosphammite Image
Images:
Phosphammite Crystallography
Axial Ratios:
a:b:c =1.6048:1:1.1959
Cell Dimensions:
a = 10.735, b = 6.689, c = 8, Z = 4; beta = 109.72° V = 540.76 Den(Calc)= 1.62
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /c
X Ray Diffraction:
By Intensity(I/Io ): 5.05(1), 5.57(0.75), 4.94(0.65),
Physical Properties of Phosphammite
Color:
Colorless.
Density:
1.33
Diaphaneity:
Transparent
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Phosphammite
Gladstone-Dale:
CI meas = -2.209 (Poor) - where the CI = (1-KPDmeas /KC ) CI calc = -1.634 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.3202,KPDmeas = 0.39,KC = 0.1215 Ncalc = 1.16 - 1.2
Optical Data:
Biaxial (+), a=1.508, b=1.518, g=1.53, bire=0.0220
Calculated Properties of Phosphammite
Electron Density:
Bulk Density (Electron Density)=1.72 gm/cc note: Specific Gravity of Phosphammite =1.62 gm/cc.
Fermion Index:
Fermion Index = 0.21 Boson Index = 0.79
Photoelectric:
PEPhosphammite = 1.18 barns/electronU=PEPhosphammite x r Electron Density= 2.02 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Phosphammite is Not Radioactive
Phosphammite Classification
Dana Class:
37.01.03.01 (37) Anhydrous Acid Phosphates, etc
(37.01) with miscellaneous formulae
(37.01.03) Dana Group
37.01.03.01 Phosphammite (NH4)2HPO4 P 21 /c 2/m
Strunz Class:
08.AD.20 08 - PHOSPHATES, ARSENATES, VANADATES
08.A - Phosphates, etc. without additional anions, without H2O
08.AD -With only large cations
08.AD.20 Phosphammite (NH4)2HPO4 P 21 /c 2/m
Other Phosphammite 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 Phosphammite :
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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Print or Cut-and-Paste your Phosphammite Specimen Label here :
Phosphammite
(NH4)2HPO4
Dana No: 37.01.03.01 Strunz No: 08.AD.20
Locality:
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