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Struvite-(K) Mineral Data
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General Struvite-(K) Information
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 Chemical Formula: |
KMg(PO4)•6(H2O) |
| Composition: |
Molecular Weight = 266.47 gm |
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Potassium 14.67 % K 17.68 % K2O |
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Magnesium 9.12 % Mg 15.13 % MgO |
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Phosphorus 11.62 % P 26.63 % P2O5 |
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Hydrogen 4.54 % H 40.56 % H2O |
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Oxygen 60.04 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KMg(PO4)•6(H2O) |
| Environment: |
Found in a dolomitic rock of Triassic age with small cavities, which contain mainly dolomite crystals. Schertelite-struvite group |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Lengenbach, Binntal, Valais, Switzerland Link to MinDat.org Location Data. |
| Name Origin: |
Named as the K-analogue of struvite |
| Name Pronunciation: |
Struvite-(K)  |
| Synonym: |
IMA2003-048 |
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Struvite-(K) Crystallography
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| Axial Ratios: |
a:b:c =1.118:1:1.8053 |
| Cell Dimensions: |
a = 6.903, b = 6.174, c = 11.146, Z = 2; V = 475.03 Den(Calc)= 1.86 |
| Crystal System: |
Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P mn21 |
| X Ray Diffraction: |
By Intensity(I/Io): 4.26(1), 3.27(0.9), 4.14(0.8),2.65(0.7), 1.954(0.5), 2.699(0.5), 2.905(0.5), |
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Physical Properties of Struvite-(K)
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| Color: |
Colorless. |
| Diaphaneity: |
Transparent |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Struvite-(K)
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| Gladstone-Dale: |
CI calc= -0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2642,KC= 0.2516
Ncalc = 1.47 |
| Optical Data: |
Biaxial (+), a=1.49, b=1.493, |
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Calculated Properties of Struvite-(K)
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| Electron Density: |
Bulk Density (Electron Density)=1.93 gm/cc
note: Specific Gravity of Struvite-(K) =1.86 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0094338489
Boson Index = 0.9905661511 |
| Photoelectric: |
PEStruvite-(K) = 2.27 barns/electron
U=PEStruvite-(K) x relectron= 4.38 barns/cc.
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| Radioactivity: |
GRapi = 219.29 (Gamma Ray American Petroleum Institute Units)
Concentration of Struvite-(K) per GRapi unit = 0.46 (%)
Estimated Radioactivity from Struvite-(K)  - barely detectable
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Struvite-(K) Classification
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| Dana Class: |
40.01.01.02 (40)Hydrated Phosphates, etc |
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(40.01)where A++ B++ (XO4) � x(H2O) |
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(40.01.01)Struvite Group |
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40.01.01.01 Struvite (NH4)MgPO4•6(H2O) P mn21 mm2 |
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40.01.01.02 Struvite-(K)! KMg(PO4)•6(H2O) P mn21 mm2 |
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40.01.01.03 Hazenite KNaMg2(PO4)2•14H2O Pmnb 2/m 2/m 2/m |
| Strunz Class: |
08.CH.40 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.C - Phosphates without Additional Anions, with H2O |
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08.CH -With large and medium-sized cations, RO4:H2O < 1:1 |
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08.CH.40 Struvite (NH4)MgPO4•6(H2O) P mn21 mm2 |
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08.CH.40 Struvite-(K)! KMg(PO4)•6(H2O) P mn21 mm2 |
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08.CH.40 Hazenite KNaMg2(PO4)2•14H2O Pmnb 2/m 2/m 2/m |
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Other Struvite-(K) Information
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| References: |
NAME( AmMin, 94:403) PHYS. PROP.(AmMin, 94:403) OPTIC PROP.(AmMin, 94:403) |
| See Also: |
Links to other databases for Struvite-(K) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Struvite-(K) Specimen Label here :
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Struvite-(K)
KMg(PO4)•6(H2O)
Dana No: 40.01.01.02 Strunz No: 08.CH.40
Locality:
Notes:
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