Struvite-(K) Mineral Data

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General Struvite-(K) Information

Chemical Formula:

KMg(PO4)•6(H2O)

Composition:

Molecular Weight = 266.47 gm

Potassium 14.67 % K 17.68 % K₂O

Magnesium 9.12 % Mg 15.13 % MgO

Phosphorus 11.62 % P 26.63 % P₂O₅

Hydrogen 4.54 % H 40.56 % H₂O

Oxygen 60.04 % O

______ ______

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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Images:

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Struvite-(K) Crystallography

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 - PyramidalH-M Symbol (mm2) Space Group: P mn2₁

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

By Intensity(I/I_o): 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),

Physical Properties of Struvite-(K)

Color:

Colorless.

Diaphaneity:

Transparent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Struvite-(K)

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,

Calculated Properties of Struvite-(K)

Electron Density:

Bulk Density (Electron Density)=1.93 gm/cc
note: Specific Gravity of Struvite-(K) =1.86 gm/cc.

Fermion Index:

Fermion Index = 0.0094338489
Boson Index = 0.9905661511

Photoelectric:

PE_Struvite-(K)= 2.27 barns/electron
U=PE_Struvite-(K) x r_electron= 4.38 barns/cc.

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

Struvite-(K) Classification

Dana Class:

40.01.01.02 (40)Hydrated Phosphates, etc

(40.01)where A++ B++ (XO4) · x(H2O)

(40.01.01)Struvite Group

40.01.01.01 Struvite (NH4)MgPO4•6(H2O) P mn2₁ mm2

40.01.01.02 Struvite-(K)! KMg(PO4)•6(H2O) P mn2₁ mm2

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

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-(K) Information

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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Ask about Struvite-(K) here :
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Print or Cut-and-Paste your Struvite-(K) Specimen Label here :

Struvite-(K)

KMg(PO4)•6(H2O)
Dana No: 40.01.01.02 Strunz No: 08.CH.40
Locality:

Notes: