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Hazenite

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Formula:
KNaMg
 
2
(PO
 
4
)
 
2
 · 14H
 
2
O
System:OrthorhombicColour:colourless
Hardness:2 - 2½
Member of:Struvite Group
Name:
Dr. Robert M. Hazen of the Carnegie Institute for Science Geophysical Laboratory


Struvite Group.

Classification of Hazenite

IMA status:Approved 2007
Nickel-Strunz 10th (pending) edition ID:8.CH.40

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O < 1:1
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Type Occurrence of Hazenite

Type Locality:Mono Lake, Mono Co., California, USA
General Appearance of Type Material:radiating elongated tabular or prismatic clusters or single crystals up to 0.06 x 0.12 x 0.40 mm
Place of Conservation of Type Material:University of Arizona Mineral Museum
Geological Setting of type material:in dried-out or decomposed algae on porous calcite and aragonite
Associated Minerals at type locality:
CalciteAragonite

Physical Properties of Hazenite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:colourless
Streak:white
Hardness (Mohs):2 - 2½
Hardness Data:Measured
Tenacity:Brittle
Cleavage:Distinct/Good
{001}
Density (measured):1.91 g/cm3
Density (calculated):1.88 g/cm3

Crystallography of Hazenite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Cell Parameters:a = 6.9349Å, b = 25.1737Å, c = 11.2189Å
Ratio:a:b:c = 0.275 : 1 : 0.446
Unit Cell Volume:V 1,958.56 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
4.302 (100)
4.184 (22)
3.262 (20)
2.803 (32)
2.786 (43)
2.767 (51)
2.742 (48)
2.670 (51)

Chemical Properties of Hazenite

Formula:
KNaMg
 
2
(PO
 
4
)
 
2
 · 14H
 
2
O
Essential elements:H, K, Mg, Na, O, P
All elements listed in formula:H, K, Mg, Na, O, P

Relationship of Hazenite to other Species

Member of:Struvite Group
Other Members of Group:

- +
Struvite
(NH
 
4
)Mg(PO
 
4
) · 6H
 
2
O
Struvite-(K)
KMg(PO
 
4
)·6H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
8.CH.05Walentaite
H(Ca,Mn
2+
 
,Fe
2+
 
)Fe
3+
3
(AsO
 
4
,PO
 
4
)
 
4
 · 7H
 
2
O
8.CH.10Anapaite
Ca
 
2
Fe
2+
 
(PO
 
4
)
 
2
 · 4H
 
2
O
8.CH.15Picropharmacolite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 11H
 
2
O
8.CH.20Dittmarite
(NH
 
4
)Mg(PO
 
4
) · H
 
2
O
8.CH.20Niahite
(NH
 
4
)(Mn
2+
 
,Mg)(PO
 
4
) · H
 
2
O
8.CH.25Francoanellite
K
 
3
Al
 
5
(PO
 
4
)
 
2
(HPO
 
4
)
 
3
 · 12H
 
2
O
8.CH.25Taranakite
(K,NH
 
4
)Al
 
3
(PO
 
4
)
 
3
(OH) · 9H
 
2
O
8.CH.30Schertelite
(NH
 
4
)
 
2
MgH
 
2
(PO
 
4
)
 
2
 · 4H
 
2
O
8.CH.35Hannayite
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
 · 8H
 
2
O
8.CH.40Struvite
(NH
 
4
)Mg(PO
 
4
) · 6H
 
2
O
8.CH.40Struvite-(K)
KMg(PO
 
4
)·6H
 
2
O
8.CH.45Rimkorolgite
(Mg,Mn)
 
5
(Ba,Sr,Ca)(PO
 
4
)
 
4
 · 8H
 
2
O
8.CH.50Bakhchisaraitsevite
Na
 
2
Mg
 
5
(PO
 
4
)
 
4
 · 7H
 
2
O
8.CH.55Fahleite
Zn
 
5
CaFe
 
2
(AsO
 
4
)
 
6
 · 14H
 
2
O
8.CH.55Smolyaninovite
8.CH.55Smolianinovite
(Co,Ni,Mg,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(AsO
 
4
)
 
4
 · 11H
 
2
O
8.CH.60Barahonaite-(Al)
(Ca,Cu,Na,Fe
3+
 
,Al)
 
12
Al
 
2
(AsO
 
4
)
 
8
(OH,Cl)
 
x
 · nH
 
2
O
8.CH.60Barahonaite-(Fe)
(Ca,Cu,Na,Fe
3+
 
,Al)
 
12
Fe
3+
2
(AsO
 
4
)
 
8
(OH,Cl)
 
x
 · nH
 
2
O

Other Names for Hazenite

Synonyms:
IMA2007-061
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Hazenite

Reference List:

- +
Yang, H., Sun, H. J. and Downs, R. T. (2011): Hazenite, KNaMg2(PO4)2·14H2O, a new biologically related phosphate mineral, from Mono Lake, California, U.S.A. American Mineralogist, 96, 675–681.

Internet Links for Hazenite

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    • Localities for Hazenite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    USA
     
    • California
      • Mono Co.
    		IMA website - March 2008
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