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Hannayite Mineral Data

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General Hannayite Information

Help on Chemical  Formula: Chemical Formula: (NH4)2Mg3H4(PO4)4•8(H2O)
Help on Composition: Composition: Molecular Weight = 637.03 gm
   Magnesium   11.45 %  Mg   18.98 % MgO
   Phosphorus  19.45 %  P    44.56 % P2O5
   Hydrogen     1.27 %  H      -   % Calc as (NH4)2O
   Hydrogen     3.16 %  H    28.28 % H2O
   Nitrogen     4.40 %  N     8.17 % (NH4)2O
   Oxygen      60.28 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)2Mg3H4(PO4)4•8(H2O)
Help on Environment: Environment: Rare druses on guano-derived phosphate mineral crusts in caves.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1878
Help on Locality: Locality: Skipton lava tube caves, 40 km southwest of Ballarat, Victoria, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for James Ballantine Hannay (1855-1931), Scottish chemist, University of Manchester, Manchester, England.
Help on Name Pronunciation: Name Pronunciation: Hannayite + Pronunciation Say HANNAYITE
Help on Synonym: Synonym: ICSD 623
  PDF 16-361
 

Hannayite Image

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  Hannayite   Newberyite

Comments: Translucent white prismatic crystals of hannayite on brown newberyite.
Location: Skipton Caves, Victoria, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hannayite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6689:1:0.5821
Help on Cell Dimensions: Cell Dimensions: a = 7.7, b = 11.51, c = 6.7, Z = 1; alpha = 76°, beta = 99.8°, gamma = 115.8° V = 511.16 Den(Calc)= 2.07
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.96(1), 3.46(0.75), 5.15(0.3),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 3 3) ( 1 1 0) ( 1 1 0) ( 1 0 0) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.

 

Physical Properties of Hannayite

Help on Cleavage: Cleavage: {001} Perfect, {110} Indistinct, {110} Indistinct
Help on Color: Color: Yellow.
Help on Density: Density: 2.03
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Hannayite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.245 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.239 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2672,KPDmeas= 0.2686,KC= 0.2157
Ncalc = 1.44
Help on Optical Data: Optical Data: Biaxial (-), a=1.504-1.555, b=1.522-1.572, g=1.539-1.579, bire=0.0240-0.0350, 2V(Calc)=64-86, 2V(Meas)=45-90.
 

Calculated Properties of Hannayite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.11 gm/cc
note: Specific Gravity of Hannayite =2.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEHannayite = 1.26 barns/electron
U=PEHannayite x rElectron Density= 2.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hannayite is Not Radioactive
 

Hannayite Classification

Help on  Dana Class: Dana Class: 39.03.05.01 (39)Hydrated Acid Phosphates, etc
  (39.03)with miscellaneous formulae
  (39.03.05)Dana Group
 
39.03.05.01 Hannayite (NH4)2Mg3H4(PO4)4•8(H2O) P1 1
 
39.03.05.02 Francoanellite H6(K,Na)3(Al,Fe)5(PO4)8•13(H2O) R 3c or R 3c Trig
Help on  Strunz Class: Strunz Class: 08.CH.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CH -With large and medium-sized cations, RO4:H2O < 1:1
 
08.CH.35 Hannayite (NH4)2Mg3H4(PO4)4•8(H2O) P1 1
 

Other Hannayite 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 Hannayite :
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
15 - WWW-MINCRYST

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

Hannayite

(NH4)2Mg3H4(PO4)4•8(H2O)
Dana No: 39.03.05.01 Strunz No: 08.CH.35
Locality:

 

Notes:

 

 
   
 


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