Mineralogy Database

Biphosphammite Mineral Data

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General Biphosphammite Information

Help on Chemical  Formula: Chemical Formula: (NH4,K)H2PO4
Help on Composition: Composition: Molecular Weight = 120.29 gm
   Potassium    8.13 %  K     9.79 % K2O
   Phosphorus  25.75 %  P    59.00 % P2O5
   Hydrogen     2.51 %  H      -   % Calc as (NH4)2O
   Hydrogen     1.68 %  H    14.98 % H2O
   Nitrogen     8.73 %  N    16.23 % (NH4)2O
   Oxygen      53.20 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)0.75K0.25H2(PO4)
Help on Environment: Environment: Occurs as an alteration of phosphammite in guano, due to loss of ammonium (NH4).
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1870
Help on Locality: Locality: On Guanape Island, south of Trujillo, Peru. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: As a BIPHOSPHate of AMMonium.
Help on Name Pronunciation: Name Pronunciation: Biphosphammite + Pronunciation Say BIPHOSPHAMMITE
 

Biphosphammite Image

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  Biphosphammite

Comments: Vuggy, dark green-brown biphosphammite.
Location: Mason Bat Cave, Mason County, Texas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Archerite   Biphosphammite

Comments: Buff-colored biphosphammite with white archerite crusts.
Location: Cockelbiddy Cave, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Biphosphammite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.98082
Help on Cell Dimensions: Cell Dimensions: a = 7.4835, c = 7.34, Z = 4; V = 411.06 Den(Calc)= 1.94
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.75(1), 3.02(0.9), 5.24(0.9),
 

Physical Properties of Biphosphammite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Colorless, Gray white.
Help on Density: Density: 2.04
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Biphosphammite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.383 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.455 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.259,KPDmeas= 0.2463,KC= 0.1781
Ncalc = 1.35 - 1.36
Help on Optical Data: Optical Data: Uniaxial (-), e=1.48, w=1.525, bire=0.0450.
 

Calculated Properties of Biphosphammite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.10 gm/cc
note: Specific Gravity of Biphosphammite =2.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEBiphosphammite = 2.06 barns/electron
U=PEBiphosphammite x relectron= 4.33 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 120.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Biphosphammite per GRapi unit = 0.83 (%)

Estimated Radioactivity from Biphosphammite - barely detectable

 

Biphosphammite Classification

Help on  Dana Class: Dana Class: 37.01.04.01 (37)Anhydrous Acid Phosphates, etc
  (37.01)with miscellaneous formulae
  (37.01.04)Dana Group
 
37.01.04.01 Biphosphammite (NH4,K)H2PO4 I 42d 4 2m
 
37.01.04.02 Archerite (K,NH4)H2PO4 I 42d 4 2m
Help on  Strunz Class: Strunz Class: 08.AD.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AD -With only large cations
 
08.AD.15 Archerite (K,NH4)H2PO4 I 42d 4 2m
 
08.AD.15 Biphosphammite (NH4,K)H2PO4 I 42d 4 2m
 

Other Biphosphammite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Biphosphammite :
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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Biphosphammite

(NH4,K)H2PO4
Dana No: 37.01.04.01 Strunz No: 08.AD.15
Locality:

 

Notes:

 

 
   
 


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