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Hannayite

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Big Photo

Skipton Caves (Skipton lava caves; Mt Widderin Caves), Mt. Widderin (Anderson's Hill), Skipton, Corangamite Shire, Victoria, Australia
© Knut Eldjarn

Show Hannayite Photos (3)



Formula:
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
 · 8H
 
2
O
System:TriclinicColour:Light yellow; colourless ...
Hardness:2 - 3
Name:After J.B. Hannay (1855-1931), English chemist, University of Manchester, England.
This page provides mineralogical data about Hannayite.

Classification of Hannayite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/C.23-40
Nickel-Strunz 10th (pending) edition ID:8.CH.35

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O < 1:1
Dana 8th edition ID:39.3.5.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
Hey's CIM Ref.:19.3.24

19 : Phosphates
3 : Phosphates of Be and Mg
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Type Occurrence of Hannayite

Type Locality:Skipton Caves (Skipton lava caves; Mt Widderin Caves), Mt. Widderin (Anderson's Hill), Skipton, Corangamite Shire, Victoria, Australia
Year of Discovery:1878

Occurrences of Hannayite

Geological Setting:Guano derived mineral crusts in caves.

Physical Properties of Hannayite

Diaphaneity (Transparency):Transparent, Translucent
Colour:Light yellow; colourless in transmitted light.
Hardness (Mohs):2 - 3
Cleavage:Distinct/Good
On {001}, complete; on {110}, {110} and {130}, poor.
Density (measured):1.893 g/cm3
Density (calculated):2.03 g/cm3

Crystallography of Hannayite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 7.70Å, b = 11.51Å, c = 6.70Å
α = 76°, β = 99.8°, γ = 115.8°
Ratio:a:b:c = 0.669 : 1 : 0.582
Unit Cell Volume:V 517.30 ų (Calculated from Unit Cell)
Morphology:Crystals small and slender, elongated [001] and striated parallel to it. Tabular to 12mm, radial sprays of laths.

Optical Data of Hannayite

Type:Biaxial (-)
RI values: nα = 1.504 - 1.555 nβ = 1.522 - 1.572 nγ = 1.539 - 1.579
2V:Measured: 45° to 90°, Calculated: 64° to 86°
Maximum Birefringence:δ = 0.035

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:Relatively weak r < v

Chemical Properties of Hannayite

Formula:
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
 · 8H
 
2
O
Essential elements:H, Mg, N, O, P
All elements listed in formula:H, Mg, N, O, P

Relationship of Hannayite to other Species

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.40Struvite
(NH
 
4
)Mg(PO
 
4
) · 6H
 
2
O
8.CH.40Struvite-(K)
KMg(PO
 
4
)·6H
 
2
O
8.CH.40Hazenite
KNaMg
 
2
(PO
 
4
)
 
2
 · 14H
 
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
Related Minerals - Hey's Index Grouping:

- +
19.3.1Moraesite
Be
 
2
(PO
 
4
)(OH) · 4H
 
2
O
19.3.2Beryllonite
NaBePO
 
4
19.3.3Hurlbutite
CaBe
 
2
(PO
 
4
)
 
2
19.3.4Hydroxylherderite
CaBe(PO
 
4
)(OH,F)
19.3.5Glucine
CaBe
 
4
(PO
 
4
)
 
2
(OH)
 
4
 · 0.5H
 
2
O
19.3.6Fransoletite
Ca
 
3
Be
 
2
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
 · 4H
 
2
O
19.3.7Uralolite
Ca
 
2
Be
 
4
(PO
 
4
)
 
3
(OH)
 
3
 · 5H
 
2
O
19.3.9Pahasapaite
Li
 
8
(Ca,Li,K)
 
10.5
Be
 
24
(PO
 
4
)
 
24
 · 38H
 
2
O
19.3.10Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
(PO
 
4
)
 
6
(OH)
 
2
 · H
 
2
O
19.3.11Gainesite
Na(Na,K)(Be,Li)Zr
 
2
(PO
 
4
)
 
4
 · 1.5-2H
 
2
O
19.3.12Roscherite
Ca
 
2
Mn
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
 · 6H
 
2
O
19.3.13Faheyite
(Mn,Mg,Na)Be
 
2
Fe
 
2
(PO
 
4
)
 
4
 · 6H
 
2
O
19.3.14Farringtonite
Mg
 
3
(PO
 
4
)
 
2
19.3.15Holtedahlite
Mg
 
2
(PO
 
4
)(OH)
19.3.16Althausite
Mg
 
2
(PO
 
4
)(OH,F)
19.3.17Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
19.3.18Phosphorrösslerite
Mg(HPO
 
4
) · 7H
 
2
O
19.3.19Bobierrite
Mg
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
19.3.20Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
19.3.21Panethite
(Na,Ca)
 
2
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)
 
2
19.3.22Dittmarite
(NH
 
4
)Mg(PO
 
4
) · H
 
2
O
19.3.23Struvite
(NH
 
4
)Mg(PO
 
4
) · 6H
 
2
O

Other Names for Hannayite

Other Languages:
German:Hannayit
Russian:Ганнайит
Simplified Chinese:水磷铵镁石
Spanish:Hannayita

Other Information

Other Information:Readily soluble in acids.
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 Hannayite

Reference List:

- +
Ulrich and vom Rath (1878) Berichte Niederrheinische Gesellschaft für Natur und Heilkunde, Bonn: 35, january 7: 11.

Ulrich and vom Rath (1879) Berichte Niederrheinische Gesellschaft für Natur und Heilkunde, Bonn: 36, January 13: 5.

Goldschmidt, V. (1918) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 4: 110.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 83 (identity of material as Hannayite uncertain).

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 699-700.

American Mineralogist (1963): 48: 635-641.

Acta Crystallographica: B32: 2842-2848.

Internet Links for Hannayite

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    • Localities for Hannayite

    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.
    Australia
     
    • Victoria
    		No reference listed
      • Corangamite Shire
        • Skipton
          • Mt. Widderin (Anderson's Hill)
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 699, 700, 710.
    • Western Australia
      • Dundas Shire
        • Cocklebiddy Roadhouse
    		Min. Mag. 39,467-469(1973); Caves: processes, development, and management By David S. Gillieson
    Kenya
     
    • Rift Valley Province
      • Suswa Volcano
    		Forti, P., E. Galli & A. Rossi (2004):"Minerogenesis of volcanic caves of Kenya" , Int. J. Speleol. 32, 3-18
    Malaysia
     
    • Borneo Island
      • Sarawak
    		Mineralogical Magazine (1983): 47: 79-80.
    South Africa
    Cairncross, B. and Dixon, R., (1995), Minerals of South Africa.
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