Biphosphammite Mineral Data (original) (raw)

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

Click Here for Larger Biphosphammite Image in a New Browser Window Images:

Click Here for Larger Biphosphammite Image in a New Browser Window Images:

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 - ScalenohedralH-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),

Click Here for Large Biphosphammite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

| | Khan A A , Baur W H , Acta Crystallographica, Section B , 29 (1973) p.2721-2726, Refinement of the crystal structures of ammonium dihydrogen phosphate and, ammonium dihydrogen arsenate, Locality: synthetic, Note: known as ADP | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

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

Search for Biphosphammite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Biphosphammite :

A Bijoux Google Search for Biphosphammite
Adam's Minerals Google Search for Biphosphammite
Cape Minerals Google Search for Biphosphammite
Dakota Matrix Minerals Google Search for Biphosphammite
Excalibur Mineral Corp. Google Search for Biphosphammite
Exceptional Minerals Google Search for Biphosphammite
John Betts Fine Minerals Search for Biphosphammite
McDougall Minerals Google Search for Biphosphammite
Mineral News Website Link
Rock and Mineral Shows Google Search for Biphosphammite
Weinrich Minerals, Inc. Google Search for Biphosphammite

Ask about Biphosphammite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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

Biphosphammite

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

Notes: