Hazenite Mineral Data

General Hazenite Information

Chemical Formula:

KNaMg2(PO4)2•14H2O

Composition:

Molecular Weight = 552.85 gm

Potassium 7.07 % K 8.52 % K₂O

Sodium 4.16 % Na 5.61 % Na₂O

Magnesium 8.79 % Mg 14.58 % MgO

Phosphorus 11.21 % P 25.67 % P₂O₅

Hydrogen 5.10 % H 45.62 % H₂O

Oxygen 63.67 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

KNaMg₂(PO₄)₂•14(H₂O)

Environment:

Found in dried-out or decomposed algae on porous calcium-carbonate (calcite and aragonite) substrates. Precipitated by microbes. Struvite group

IMA Status:

Proposed IMA 2007

Locality:

South shore of Mono Lake, California, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Robert M. Hazen, Senior Research Scientist at the Carnegie Institution of Washingtonï¿½s Geophysical Laboratory and the Clarence Robinson Professor of Earth Science at Georg e Mason University.

Synonym:

IMA2007-061

Hazenite Crystallography

Axial Ratios:

a:b:c =0.2754:1:0.4456

Cell Dimensions:

a = 6.9349, b = 25.1737, c = 11.2189, Z = 4; V = 1,958.56 Den(Calc)= 1.87

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmnb

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

By Intensity(I/I_o): 4.302(1), 2.67(0.51), 2.767(0.51),2.742(0.48), 2.786(0.43), 2.803(0.32), 4.184(0.22), 3.262(0.2),

Physical Properties of Hazenite

Cleavage:

{001} Good

Color:

Colorless.

Density:

1.91

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Hazenite

Optical Data:

NCalc= 1.48 - from Gladstone-Dale relationship (KC = 0.2586) where Ncalc=Dcalc*KC+1
NCalc= 1.49 - from Gladstone-Dale relationship (KC = 0.2586) where Ncalc=Dmeas*KC+1

Calculated Properties of Hazenite

Electron Density:

Bulk Density (Electron Density)=1.95 gm/cc
note: Specific Gravity of Hazenite =1.87 gm/cc.

Fermion Index:

Fermion Index = 0.0091142911
Boson Index = 0.9908857089

Photoelectric:

PE_Hazenite= 1.59 barns/electron
U=PE_Hazenite x r_electron= 3.11 barns/cc.

Radioactivity:

GRapi = 106.32 (Gamma Ray American Petroleum Institute Units)
Concentration of Hazenite per GRapi unit = 0.94 (%)

Estimated Radioactivity from Hazenite - barely detectable

Hazenite Classification

Dana Class:

40.01.01.03 (40)Hydrated Phosphates, etc

(40.01)where A++ B++ (XO4) ï¿½ 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 Hazenite Information

See Also:

Links to other databases for Hazenite :
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 Hazenite Specimen Label here :

Hazenite

KNaMg2(PO4)2•14H2O
Dana No: 40.01.01.03 Strunz No: 08.CH.40
Locality:

Notes:

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