Foggite
A valid IMA mineral species
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About Foggite
Formula:
CaAl(PO4)(OH)2 · H2O
Colour:
Colorless to snow-white
Hardness:
4
Specific Gravity:
2.78
Crystal System:
Orthorhombic
Name:
Named by Paul Brian Moore, Anthony J. Irving, and Anthony R. Kampf, in honor of Forrest Franklin Fogg (21 Oct 1920 Lowell, Massachusetts, USA – 29 December 2000, Goffstown, Hillsborough, New Hampshire, USA), mineral collector of Penacook, New Hampshire, USA, amateur mineralogist and co-owner of the Palermo #1 Quarry, North Groton, New Hampshire (the type location) and who energetically worked to study and preserve unusual minerals of the Palermo series of quarries.
This page provides mineralogical data about Foggite.
Unique Identifiers
Mindat ID:
1578
Long-form identifier:
mindat:1:1:1578:9
GUID
(UUID V4):
(UUID V4):
2b38c132-5d47-4d24-be44-735f0a87fd66
IMA Classification of Foggite
Approved
Approval year:
1973
First published:
1975
Type description reference:
Moore, Paul B., Irving, Anthony J., Kampf, Anthony R. (1975) Foggite, CaAl(OH)2(H2O)[PO4]; goedkenite, (Sr,Ca)2Al(OH)[PO4]2; and samuelsonite, (Ca,Ba)Fe2+2Mn2+2Ca8Al2(OH)2[PO4]10: Three new species from the Palermo No. I pegmatite, North Groton, New Hampshire. American Mineralogist, 60 (11-12) 957-964
Classification of Foggite
8.DL.05
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
42.7.2.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
19.8.14
19 : Phosphates
8 : Phosphates of Al and other metals
19 : Phosphates
8 : Phosphates of Al and other metals
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 |
---|---|---|
Fgg | 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 Foggite
Transparency:
Translucent
Colour:
Colorless to snow-white
Streak:
White
Hardness:
4 on Mohs scale
Cleavage:
Perfect
{010}, perfect; {100}, good.
{010}, perfect; {100}, good.
Density:
2.78(1) g/cm3 (Measured) 2.77 g/cm3 (Calculated)
Optical Data of Foggite
Type:
Biaxial (+)
RI values:
nα = 1.610(2) nβ = 1.610(2) nγ = 1.611(2)
2V:
Measured: 40° to 45°
Max Birefringence:
δ = 0.001
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong
Chemistry of Foggite
Mindat Formula:
CaAl(PO4)(OH)2 · H2O
Crystallography of Foggite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 9.270(2) Å, b = 21.324(7) Å, c = 5.190(2) Å
Ratio:
a:b:c = 0.435 : 1 : 0.243
Unit Cell V:
1,025.93 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Type material: Forms include c{001}, b{010}, and a{100}. The crystals are thin tabular parallel to b{010}, slightly elongated parallel to [001], and are ten to twenty times as broad as they are thick.
Comment:
Space Group: A2122
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
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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) |
---|---|---|---|---|---|---|---|
0000473 | Foggite | Moore P B, Kampf A R, Araki T (1975) Foggite, Ca(H2O)2[CaAl2(OH)4(PO4)2]: Its atomic arrangement and relationship to calcium Tschermak's pyroxene American Mineralogist 60 965-971 | 1975 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
10.67 Å | (40) |
6.96 Å | (50) |
4.24 Å | (100) |
4.20 Å | (50) |
3.109 Å | (70) |
2.693 Å | (80) |
2.505 Å | (50) |
2.292 Å | (40) |
2.259 Å | (40) |
1.744 Å | (40) |
Comments:
From type description
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Foggite
General Appearance of Type Material:
Snow-white balls and radial platy aggregates, visually similar to stilbite.
Place of Conservation of Type Material:
U.S. National Museum, The Smithsonian Institution, Washington, D.C.
Geological Setting of Type Material:
Complex granite pegmatite
Associated Minerals at Type Locality:
Reference:
Moore, P.B., Irving, A.J., Kampf, A.R. (1975) Foggite, CaAl(OH)2(H2O)[PO4]; goedkenite, (Sr,Ca)2Al(OH)[PO4]2; and samuelsonite, (Ca,Ba)Fe22+Mn22+Ca8Al2(OH)2[PO4]10. Three new species from the Palermo No. 1 pegmatite, North Groton, New Hampshire. American Mineralogist: 60: 957-964.
Synonyms of Foggite
Other Language Names for Foggite
Common Associates
Associated Minerals Based on Photo Data:
10 photos of Foggite associated with Variscite | AlPO4 · 2H2O |
3 photos of Foggite associated with Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
2 photos of Foggite associated with Quartz | SiO2 |
2 photos of Foggite associated with Wardite | NaAl3(PO4)2(OH)4 · 2H2O |
1 photo of Foggite associated with Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
1 photo of Foggite associated with Augelite | Al2(PO4)(OH)3 |
1 photo of Foggite associated with Albite | Na(AlSi3O8) |
Related Minerals - Strunz-mindat Grouping
8.DL.10 | Cyrilovite | NaFe3+3(PO4)2(OH)4 · 2H2O |
8.DL.10 | Millisite | (Na,K)CaAl6(PO4)4(OH)9 · 3H2O |
8.DL.10 | Wardite | NaAl3(PO4)2(OH)4 · 2H2O |
8.DL.10 | Fluorowardite | NaAl3(PO4)2F2(OH)2(H2O)2 |
8.DL.15 | Agardite-(Nd) | NdCu6(AsO4)3(OH)6 · 3H2O |
8.DL.15 | Agardite-(Y) | YCu6(AsO4)3(OH)6 · 3H2O |
8.DL.15 | Agardite-(Ce) | CeCu6(AsO4)3(OH)6 · 3H2O |
8.DL.15 | Agardite-(Dy) | (Dy,La)Cu6(AsO4)3(OH)6 · 3H2O |
8.DL.15 | Agardite-(La) | LaCu6(AsO4)3(OH)6 · 3H2O |
8.DL.15 | Goudeyite | AlCu6(AsO4)3(OH)6 · 3H2O |
8.DL.15 | Mixite | BiCu6(AsO4)3(OH)6 · 3H2O |
8.DL.15 | Petersite-(Y) | (Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O |
8.DL.15 | Zálesíite | CaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O |
8.DL.15 | Plumboagardite | (Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2O |
8.DL.15 | Calciopetersite | CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O |
8.DL.15 | Petersite-(Ce) | Cu6Ce(PO4)3(OH)6 · 3H2O |
8.DL.15 | Petersite-(La) | Cu6La(PO4)3(OH)6 · 3H2O |
8.DL.20 | Cheremnykhite | Pb3Zn3(VO4)2(TeO6) |
8.DL.20 | Dugganite | Pb3Zn3(AsO4)2(TeO6) |
8.DL.20 | Kuksite | Pb3Zn3(PO4)2(TeO6) |
8.DL.20 | Wallkilldellite | Ca2Mn2+3(AsO4)2(OH)4 · 9H2O |
8.DL.20 | Wallkilldellite-(Fe) | (Ca,Cu)4Fe2+6(AsO4,SiO4)4(OH,O)8 · 18H2O |
8.DL.25 | Angastonite | CaMgAl2(PO4)2(OH)4 · 7H2O |
8.DL.30 | Långbanshyttanite | Pb2Mn2Mg(AsO4)2(OH)4 · 6H2O |
Other Information
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 Foggite
mindat.org URL:
https://www.mindat.org/min-1578.html
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References for Foggite
Reference List:
Moore, Paul B., Kampf, Anthony R., Araki, Takaharu (1975) Foggite, Ca(H2O)2[CaAl2(OH)4(PO4)2]: Its atomic arrangement and relationship to calcium Tschermak's pyroxene. American Mineralogist, 60 (11-12) 965-971
Moore, Paul B., Irving, Anthony J., Kampf, Anthony R. (1975) Foggite, CaAl(OH)2(H2O)[PO4]; goedkenite, (Sr,Ca)2Al(OH)[PO4]2; and samuelsonite, (Ca,Ba)Fe2+2Mn2+2Ca8Al2(OH)2[PO4]10: Three new species from the Palermo No. I pegmatite, North Groton, New Hampshire. American Mineralogist, 60 (11-12) 957-964
Localities for Foggite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Australia | |
| Western Australia Museum specimens +9 other references |
Canada | |
| Greengrass et al. (1999) |
Netherlands | |
| Färber (n.d.) |
North Macedonia | |
| Ermolaeva et al. (2019) |
Romania | |
| European Journal of Mineralogy +5 other references |
USA (TL) | |
| Moore et al. (1975) |
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Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA