Biphosphammite Mineral Data

Advertisment

WE BUY COLLECTIONS & SINGLE IMPORTANT SPECIMENS

General Biphosphammite Information

Chemical Formula:

(NH4,K)H2PO4

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

Empirical Formula:

(NH₄)_0.75K_0.25H₂(PO₄)

Environment:

Occurs as an alteration of phosphammite in guano, due to loss of ammonium (NH4).

IMA Status:

Valid Species (Pre-IMA) 1870

Locality:

On Guanape Island, south of Trujillo, Peru. Link to MinDat.org Location Data.

Name Origin:

As a BIPHOSPHate of AMMonium.

Name Pronunciation:

Biphosphammite + Pronunciation

Biphosphammite Image

Images:

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

Images:

Biphosphammite Archerite

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

Axial Ratios:

a:c = 1:0.98082

Cell Dimensions:

a = 7.4835, c = 7.34, Z = 4; V = 411.06 Den(Calc)= 1.94

Crystal System:

Tetragonal - ScalenohedralH-M Symbol (4 2m) Space Group: I 42d

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

By Intensity(I/I_o): 3.75(1), 3.02(0.9), 5.24(0.9),

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

Cleavage:

None

Color:

Brown, Colorless, Gray white.

Density:

2.04

Diaphaneity:

Transparent to Translucent

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Biphosphammite

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

Optical Data:

Uniaxial (-), e=1.48, w=1.525, bire=0.0450.

Calculated Properties of Biphosphammite

Electron Density:

Bulk Density (Electron Density)=2.10 gm/cc
note: Specific Gravity of Biphosphammite =2.04 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_{Biphosphammite}= 2.06 barns/electron
U=PE_{Biphosphammite} x r_electron= 4.33 barns/cc.

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

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

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

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 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 :

Dakota Matrix Minerals Google Search for Biphosphammite
John Betts Fine Minerals Search for Biphosphammite
McDougall Minerals Google Search for Biphosphammite
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 Español

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: