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Hannayite

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- ?), 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

Physical Properties of Hannayite

Colour:Light yellow; colourless in transmitted light.
Hardness (Mohs):2 - 3
Cleavage:Distinct/Good
On {001}, complete; on {110}, {1_10} and {130}, poor.
Density (measured):1.893 g/cm3

Crystallography of Hannayite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Cell Parameters:a = 7.7Å, b = 11.51Å, c = 6.7Å
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.

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

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[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 11H
 
2
O
8.CH.20Dittmarite
NH
 
4
MgPO
 
4
·H
 
2
O
8.CH.20Niahite
(NH
 
4
)(Mn
2+
 
,Mg)[PO
 
4
] · H
 
2
O
8.CH.25Francoanellite
K
 
3
Al
 
5
[(HPO
 
4
)
 
3
|PO
 
4
]
 
2
· 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
MgPO
 
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
Related Minerals - Hey's Index Grouping:
19.3.1Moraesite
Be
 
2
[OH|PO
 
4
] · 4H
 
2
O
19.3.2Beryllonite
NaBe[PO
 
4
]
19.3.3Hurlbutite
CaBe
 
2
[PO
 
4
]
 
2
19.3.4Hydroxylherderite
CaBe[(OH,F)|PO
 
4
]
19.3.5Glucine
CaBe
 
4
[(OH)
 
2
|PO
 
4
]
 
2
· 0.5H
 
2
O
19.3.6Fransoletite
Ca
 
3
Be
 
2
[HPO
 
4
|PO
 
4
]
 
2
· 4H
 
2
O
19.3.7Uralolite
Ca
 
2
Be
 
4
[OH|PO
 
4
]
 
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
[OH|(PO
 
4
)
 
3
]
 
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(Mn
2+
 
,Fe
2+
 
)
 
5
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 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
[OH|PO
 
4
]
19.3.16Althausite
Mg
 
2
[(OH,F)|PO
 
4
]
19.3.17Newberyite
MgHPO
 
4
·3H
 
2
O
19.3.18Phosphorrösslerite
MgHPO
 
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
MgPO
 
4
·H
 
2
O
19.3.23Struvite
NH
 
4
MgPO
 
4
·6H
 
2
O

Other Names for Hannayite

German names:
Hannayit
Russian names:
Ганнайит
Spanish names:
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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  • Hannayite details from Handbook of Mineralogy (PDF)
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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
      • Nullarbor Plain
        • Eucla
    Min. Mag. 39,467-469(1973)
    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
      • Sarawak
    Mineralogical Magazine (1983): 47: 79-80.
    South Africa
    Minerals of South Africa
    Minerals of South Africa
    Mineral and/or Locality
    Google
     
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