Hannayite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Hannayite
James B. Hannay
Formula:
(NH4)2Mg3H4(PO4)4 · 8H2O
Colour:
Light yellow; colourless in transmitted light.
Hardness:
2 - 3
Specific Gravity:
1.893
Crystal System:
Triclinic
Name:
Named in honor of James Ballantyne Hannay (1 January 1855, Glasgow, Scotland - 1931, Glasgow, Scotland), Scottish chemist. He is most famous for his claim of creating artificial diamonds in 1880.
This page provides mineralogical data about Hannayite.
Unique Identifiers
Mindat ID:
1816
Long-form identifier:
mindat:1:1:1816:2
Similar Names
IMA Classification of Hannayite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(N3-H4)2Mg3(PO3OH)4·8H2O
Classification of Hannayite
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
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O < 1:1
39.3.5.1
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
19.3.24
19 : Phosphates
3 : Phosphates of Be and Mg
19 : Phosphates
3 : Phosphates of Be and Mg
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Han | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Hannayite
Transparency:
Transparent, Translucent
Colour:
Light yellow; colourless in transmitted light.
Hardness:
2 - 3 on Mohs scale
Cleavage:
Distinct/Good
On {001}, complete; on {110}, {110} and {130}, poor.
On {001}, complete; on {110}, {110} and {130}, poor.
Density:
1.893 g/cm3 (Measured) 2.03 g/cm3 (Calculated)
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°
Max. Birefringence:
δ = 0.024 - 0.035
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
Relatively weak r < v
Chemistry of Hannayite
Mindat Formula:
(NH4)2Mg3H4(PO4)4 · 8H2O
Element Weights:
Crystallography of Hannayite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.70 Å, b = 11.51 Å, c = 6.70 Å
α = 76°, β = 99.8°, γ = 115.8°
α = 76°, β = 99.8°, γ = 115.8°
Ratio:
a:b:c = 0.669 : 1 : 0.582
Unit Cell 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.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009576 | Hannayite | Catti M, Franchini-Angela M (1976) Hydrogen bonding in the crystalline state. Structure of Mg3(NH4)2(HPO4)4*8H2O (hannayite), and crystal-chemical relationships with schertelite and struvite Acta Crystallographica B32 2842-2848 |  | 1976 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.96 Å | (100) |
| 3.46 Å | (73) |
| 5.15 Å | (28) |
| 4.64 Å | (23) |
| 3.29 Å | (22) |
| 3.75 Å | (18) |
| 3.00 Å | (15) |
Comments:
Synthetic. Data from Frazier et al. (1963).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 49 : Oxic cellular biomineralization (see also #44) | <0.54 |
| 52 : Guano- and urine-derived minerals | <0.4 |
Geological Setting:
Guano derived mineral crusts in caves.
Type Occurrence of Hannayite
Other Language Names for Hannayite
Common Associates
Associations Based on Photo Data:
| 2 photos of Hannayite associated with Syngenite | K2Ca(SO4)2 · H2O |
| 2 photos of Hannayite associated with Ammoniotinsleyite | (NH4)Al2(PO4)2(OH) · 2H2O |
| 1 photo of Hannayite associated with Newberyite | Mg(PO3OH) · 3H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CH.05 | Natrowalentaite | [Fe3+0.5Na0.5(H2O)6][NaAs3+2(Fe3+2.33W6+0.67)(PO4)2O7] |
| 8.CH.05 | Walentaite | [Mn2+(H2O)6][◻As3+3Fe3+3(PO4)2O7] |
| 8.CH.05 | Halilsarpite | [Mg(H2O)6][CaAs3+2(Fe3+2.67Mo6+0.33)(AsO4)2O7] |
| 8.CH.10 | Anapaite | Ca2Fe2+(PO4)2 · 4H2O |
| 8.CH.15 | Picropharmacolite | Ca4Mg(AsO4)2(HAsO4)2 · 11H2O |
| 8.CH.20 | Dittmarite | (NH4)Mg(PO4) · H2O |
| 8.CH.20 | Niahite | (NH4)Mn2+(PO4) · H2O |
| 8.CH.25 | Taranakite | K3Al5(PO3OH)6(PO4)2 · 18H2O |
| 8.CH.25 | Francoanellite | K3Al5(PO3OH)6(PO4)2 · 12H2O |
| 8.CH.25 | Macivorite | (NH4)3Al5(PO3OH)6(PO4)2 · 18H2O |
| 8.CH.30 | Schertelite | (NH4)2MgH2(PO4)2 · 4H2O |
| 8.CH.40 | Hazenite | KNaMg2(PO4)2 · 14H2O |
| 8.CH.40 | Struvite-(K) | KMg(PO4) · 6H2O |
| 8.CH.40 | Struvite | (NH4)Mg(PO4) · 6H2O |
| 8.CH.45 | Rimkorolgite | (Mg,Mn)5(Ba,Sr,Ca)(PO4)4 · 8H2O |
| 8.CH.50 | Bakhchisaraitsevite | Na2Mg5(PO4)4 · 7H2O |
| 8.CH.55 | Smolyaninovite | Co3Fe3+2(AsO4)4 · 11H2O |
| 8.CH.55 | Fahleite | CaZn5Fe3+2(AsO4)6 · 14H2O |
| 8.CH.60 | Barahonaite-(Fe) | (Ca,Cu,Na,Fe3+,Al)12Fe3+2(AsO4)8(OH,Cl)x · nH2O |
| 8.CH.60 | Barahonaite-(Al) | (Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2O |
| 8.CH.70 | Epifanovite | NaCaCu5(PO4)4[AsO2(OH)2] · 7H2O |
| 8.CH.75 | Esdanaite-(Ce) | NaMnCe(PO4)2 · 4H2O |
Other Information
Notes:
Readily soluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Hannayite
mindat.org URL:
https://www.mindat.org/min-1816.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Hannayite
Reference List:
Frazier, A. William, Lehr, James R., Smith, James P. (1963) The magnesium phosphates hannayite, schertelite and bobierrite. American Mineralogist, 48 (5-6) 635-641
Catti, M., Franchini-Angela, M. (1976) Hydrogen bonding in the crystalline state. Structure of Mg3(NH4)2(HPO4)4·8H2O (hannayite), and crystal–chemical relationships with schertelite and struvite. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 32 (10) 2842-2848 doi:10.1107/s056774087600900x
Localities for Hannayite
Showing 11 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Argentina | |
| Benedetto et al. (1998) |
Australia (TL) | |
| Palache et al. (1951) |
| Caves: processes +1 other reference |
Brazil | |
| Piló et al. (2023) |
Chile | |
| Färber (n.d.) |
Cuba | |
| Carnegie Museum of Natural History ... |
Kenya | |
| Forti et al. (2004) |
Malaysia | |
| Bridge et al. (1983) |
Namibia | |
| Marais et al. (1995) |
| Martini et al. (1999) |
South Africa | |
Quick NavTopAbout HannayiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Jiguaní, Granma Province, Cuba