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Struvite Mineral Data

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General Struvite Information

Help on Chemical  Formula: Chemical Formula: (NH4)MgPO4•6(H2O)
Help on Composition: Composition: Molecular Weight = 245.41 gm
   Magnesium    9.90 %  Mg   16.42 % MgO
   Phosphorus  12.62 %  P    28.92 % P2O5
   Hydrogen     1.64 %  H      -   % Calc as (NH4)2O
   Hydrogen     4.93 %  H    44.05 % H2O
   Nitrogen     5.71 %  N    10.61 % (NH4)2O
   Oxygen      65.20 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)Mg(PO4)•6(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1845
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Russian diplomat, H. G. von Struve (1772-1851).
Help on Name Pronunciation: Name Pronunciation: Struvite Say STRUVITE
Help on Synonym: Synonym: ICSD 14269
  PDF 47-1744

Struvite Image

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Comments: Opaque, white crystal struvite aggregates in earthy matrix.
Location: Skipton Caves, Victoria, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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Comments: Yellow-brown tabular struvite crystal. Struvite is of organogenic origin and this type locality example is formed in manure pits.
Location: Nicolaikirche, Hamburg, Germany. Scale: Specimen Size 1 x 1 x 1 cm.
© Tom Loomis / Dakota Matrix

Struvite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6196:1:0.5474
Help on Cell Dimensions: Cell Dimensions: a = 6.945, b = 11.208, c = 6.1355, Z = 2; V = 477.58 Den(Calc)= 1.71
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P mn21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.257(1), 5.601(0.6), 2.919(0.55),
Help on Forms: Forms:

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

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

Help on Above

Forms: ( 0 1 1) ( 1 0 2) ( 1 0 0) ( 0 0 1)

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Physical Properties of Struvite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: White, Yellowish white, Brownish white.
Help on Density: Density: 1.7
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white

Optical Properties of Struvite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.245 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.237 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2914,KPDmeas= 0.2931,KC= 0.2355
Ncalc = 1.4
Help on Optical Data: Optical Data: Biaxial (+), a=1.495, b=1.496, g=1.504, bire=0.0090, 2V(Calc)=40, 2V(Meas)=37.367.

Calculated Properties of Struvite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.81 gm/cc
note: Specific Gravity of Struvite =1.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEStruvite = 0.96 barns/electron
U=PEStruvite x rElectron Density= 1.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Struvite is Not Radioactive

Struvite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.01)where A++ B++ (XO4) � x(H2O)
  (40.01.01)Struvite Group Struvite (NH4)MgPO4•6(H2O) P mn21 mm2 Struvite-(K)! KMg(PO4)•6(H2O) P mn21 mm2 Hazenite KNaMg2(PO4)2•14H2O Pmnb 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.CH.40 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.40 Struvite (NH4)MgPO4•6(H2O) P mn21 mm2
08.CH.40 Struvite-(K)! KMg(PO4)•6(H2O) P mn21 mm2
08.CH.40 Hazenite KNaMg2(PO4)2•14H2O Pmnb 2/m 2/m 2/m

Other Struvite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Struvite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - Philatelic Mineralogy
16 - QUT Mineral Atlas
17 - Ruff.Info

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Dana No: Strunz No: 08.CH.40





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