Gordonite (original) (raw)

A valid IMA mineral species - grandfathered

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About GordoniteHide

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Formula:

MgAl2(PO4)2(OH)2 · 8H2O

Colour:

Smoky-white, buff, colourless; crystals = pale pink or pale green on tips; colourless in transmitted light.

Name:

Named in honor of Samuel (Sam) George Gordon (21 June 1897, Philadelphia, Pennsylvania, USA - 17 May 1953, Cincinnati, Ohio, USA), mineralogist, Academy of Natural Sciences, Philadelphia, Pennsylvania, USA. He wrote 'The Mineralogy of Pennsylvania' when he was 24. He made five international trips to collect minerals for the Academy's Vaux collection, traveling to Peru, Bolivia, Chile, Greenland and Africa and described 9 new species. He was also a founder of the Mineralogical Society of America and helped start the American Mineralogist.

The magnesium analogue of Mangangordonite.

A rare secondary mineral formed from the alteration of variscite in nodules in limestone or as a late-stage hydrothermal mineral in complex granitic pegmatites.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:1728:8

87f50afe-8cc3-4925-a453-f91e3737203d

IMA Classification of GordoniteHide

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Approved, 'Grandfathered' (first described prior to 1959)

Classification of GordoniteHide

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8.DC.30

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1

42.11.14.4

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O

19.8.9

19 : Phosphates
8 : Phosphates of Al and other metals

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol Source Reference
Gdo IMA–CNMNC Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of GordoniteHide

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Pronunciation:

Play Recorded by Country
Sorry, your browser doesn't support HTML5 audio. Jolyon Ralph United Kingdom

Physical Properties of GordoniteHide

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Comment:

Lustre pearly on {010}.

Colour:

Smoky-white, buff, colourless; crystals = pale pink or pale green on tips; colourless in transmitted light.

Cleavage:

Perfect
On {010}, perfect; on {100}, fair; on {001}, poor.

Density:

2.23 g/cm3 (Measured) 2.22 g/cm3 (Calculated)

Optical Data of GordoniteHide

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RI values:

_n_α = 1.534 _n_β = 1.543 _n_γ = 1.558

δ = 0.024

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Optical Extinction:

X ≃ ⊥ {010}.

Chemistry of GordoniteHide

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Mindat Formula:

MgAl2(PO4)2(OH)2 · 8H2O

Crystallography of GordoniteHide

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Cell Parameters:

a = 5.246 Å, b = 10.532 Å, c = 6.975 Å
α = 107.51°, β = 111.03°, γ = 72.21°

Ratio:

a:b:c = 0.498 : 1 : 0.662

Unit Cell V:

334.48 ų (Calculated from Unit Cell)

Morphology:

Crystals rare, prismatic [001] to platy {010}, with dominant basal pedions; elongated and strongly striated along [001], and less markedly on [100]. {001} is lacking at times, leaving the crystals terinated entirely by {011}; rarely doubly terinated. May exhibit numerous lesser forms. Commonly in bundles and sheaflike aggregates with all individual crystals of one group similarly terminated.

Crystal StructureHide

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ID Species Reference Link Year Locality Pressure (GPa) Temp (K)
0014827 Gordonite Leavens P B, Rheingold A L (1988) Crystal structures of gordonite, MgAl2(PO4)2(OH)2(H2O)6*2H2O, and its Mn analog Neues Jahrbuch fur Mineralogie, Monatshefte 1988 265-270 1988 Little Green Monster mine, Fairfield, Utah, USA 0 293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

d-spacing Intensity
9.78 Å (100)
3.17 Å (80)
2.83 Å (70)
2.56 Å (60)
6.32 Å (50)
4.76 Å (50)
3.07 Å (50)

Comments:

Little Green Monster mine, Utah, USA. The data are from Hurlbut and Honea 1962.

Geological EnvironmentHide

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Geological Setting:

Complex granitic pegmatite

Type Occurrence of GordoniteHide

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General Appearance of Type Material:

Poor crystals, but giving some reflections from faces.

Place of Conservation of Type Material:

U.S. National Museum of Natural History, Washington, D.C., USA: #137128.

Geological Setting of Type Material:

Variscite nodules in limestone.

Associated Minerals at Type Locality:

Other Language Names for GordoniteHide

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Relationship of Gordonite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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8.DC. Ianbruceite Zn2(AsO4)(OH) · 3H2O Mon. 2/m : _P_21/b
8.DC. Césarferreiraite Fe2+ Fe3+2(AsO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC. Ferrivauxite Fe3+Al2(PO4)2(OH)3 · 5H2O Tric. 1 : _P_1
8.DC.05 Nissonite Cu2Mg2(PO4)2(OH)2 · 5H2O Mon. 2/m : _B_2/b
8.DC.07 Euchroite Cu2(AsO4)(OH) · 3H2O Orth. 222 : _P_212121
8.DC.10 Legrandite Zn2(AsO4)(OH) · H2O Mon. 2/m : _P_21/b
8.DC.12 Strashimirite Cu8(AsO4)4(OH)4 · 5H2O Mon.
8.DC.15 Arthurite CuFe3+2(AsO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.15 Earlshannonite Mn2+Fe3+2(PO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.15 Ojuelaite ZnFe3+2(AsO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.15 Whitmoreite Fe2+Fe3+2(PO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.15 Cobaltarthurite CoFe3+2(AsO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.15 Bendadaite Fe2+Fe3+2(AsO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.15 Kunatite CuFe3+2(PO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.15 UM2006-27-PO:FeHZn ZnFe3+2(PO4)2(OH)2 · 4H2O Mon.
8.DC.15 UKI-2006-(PO:AlCuFeH) Fe2+Al3+2(PO4)2(OH)2 · 4H2O
8.DC.17 Kleemanite ZnAl2(PO4)2(OH)2 · 3H2O Mon.
8.DC.20 Bermanite Mn2+Mn3+2(PO4)2(OH)2 · 4H2O Mon. 2/m : _P_2/b
8.DC.20 Coralloite Mn2+Mn3+2(AsO4)2(OH)2 · 4H2O Tric. 1 : _P_1
8.DC.20 Magnesiobermanite MgMn3+2(PO4)2(OH)2 · 4H2O Mon. 2 : _P_21
8.DC.22 Kovdorskite Mg2(PO4)(OH) · 3H2O Mon. 2/m : _P_21/b
8.DC.25 Ferristrunzite Fe3+Fe3+2(PO4)2(OH)3 · 5H2O Tric.
8.DC.25 Ferrostrunzite Fe2+Fe3+2(PO4)2(OH)2 · 6H2O Tric.
8.DC.25 Metavauxite Fe2+Al2(PO4)2(OH)2 · 8H2O Mon. 2/m : _P_21/b
8.DC.25 Metavivianite Fe2+Fe3+2(PO4)2(OH)2 · 6H2O Tric. 1 : _P_1
8.DC.25 Strunzite Mn2+Fe3+2(PO4)2(OH)2 · 6H2O Tric. 1 : _P_1
8.DC.25 Zincostrunzite ZnFe3+2(PO4)2(OH)2 · 6.5H2O Tric. 1 : _P_1
8.DC.27 Beraunite Fe3+6(PO4)4O(OH)4 · 6H2O Mon. m : B b
8.DC.27 Tvrdýite Fe2+Fe3+2 Al3(PO4)4(OH)5(H2O)4 · 2H2O Mon. 2/m : _B_2/b
8.DC.27 Zincoberaunite ZnFe3+5(PO4)4(OH)5 · 6H2O Mon. 2/m : _B_2/b
8.DC.30 Laueite Mn2+Fe3+2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Mangangordonite Mn2+Al2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Paravauxite Fe2+Al2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Pseudolaueite Mn2+Fe3+2(PO4)2(OH)2 · 8H2O Mon. 2/m : _P_21/b
8.DC.30 Sigloite Fe3+Al2(PO4)2(OH)3 · 7H2O Tric. 1 : _P_1
8.DC.30 Stewartite Mn2+Fe3+2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Ushkovite MgFe3+2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Ferrolaueite Fe2+Fe3+2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Kastningite (Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Maghrebite MgAl2(AsO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Nordgauite MnAl2(PO4)2(F,OH)2 · 5H2O Tric. 1 : _P_1
8.DC.30 Kayrobertsonite [MnAl2(PO4)2(OH)2(H2O)4] · 2H2O Tric. 1 : _P_1
8.DC.30 Kummerite Mn2+Fe3+Al(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.32 Tinticite Fe3+3(PO4)2(OH)3 · 3H2O Tric. 1 : _P_1
8.DC.32 Kamarizaite Fe3+3(AsO4)2(OH)3 · 3H2O Tric. 1 : _P_1
8.DC.35 Vauxite Fe2+Al2(PO4)2(OH)2 · 6H2O Tric. 1 : _P_1
8.DC.37 Vantasselite Al4(PO4)3(OH)3 · 9H2O Orth.
8.DC.40 Cacoxenite Fe3+24AlO6(PO4)17(OH)12 · 75H2O Hex. 6/m : _P_63/m
8.DC.45 Gormanite (Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O Tric.
8.DC.45 Souzalite (Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O Tric. 1
8.DC.47 Kingite Al3(PO4)2F2(OH) · 7H2O Tric.
8.DC.50 Wavellite Al3(PO4)2(OH,F)3 · 5H2O Orth. m m m _(_2/_m_2/_m_2/m )
8.DC.50 Allanpringite Fe3+3(PO4)2(OH)3 · 5H2O Mon. 2/m : _P_21/m
8.DC.50 Fluorwavellite Al3(PO4)2(OH)2F · 5H2O Orth. m m m _(_2/_m_2/_m_2/m )
8.DC.52 Kribergite Al5(PO4)3(SO4)(OH)4 · 4H2O Tric. 1 : _P_1
8.DC.55 Mapimite Zn2Fe3+3(AsO4)3(OH)4 · 10H2O Mon. m : B m
8.DC.57 Ogdensburgite Ca2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2O Orth. m m m _(_2/_m_2/_m_2/m ) : C m m m
8.DC.60 Nevadaite (Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2O Orth. m m m _(_2/_m_2/_m_2/m )
8.DC.60 Cloncurryite Cu0.5(VO)0.5Al2(PO4)2F2 · 5H2O Mon. 2/m : _P_21/b
8.DC.62 Kenngottite Mn2+3Fe3+4(PO4)4(OH)6(H2O)2 Mon. 2/m : _P_2/b
8.DC.67 Molinelloite Cu(H2O)(OH)V4+O(V5+O4) Tric. 1 : _P_1
8.DC.70 Whitecapsite H16Fe2+5Fe3+14Sb3+6(AsO4)18O16 · 120H2O Hex. 6/m : _P_63/m
8.DC.75 Heimite PbCu2(AsO4)(OH)3 · 2H2O Mon. 2/m
8.DC.80 Lednevite Cu[PO3(OH)] · H2O Mon. 2/m : _P_21/b

Other InformationHide

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Thermal Behaviour:

Fusability of 3.
Heating in a closed tube gives water with a neutral pH.

Health Risks:

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

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References for GordoniteHide

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Reference List:

**Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.**pp.975-976

Localities for GordoniteHide

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This 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.

Locality ListHide

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- 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.

Australia
South Australia Barossa Council Penrice ⓘ Penrice marble quarry Francis et al. (self published)
City of Onkaparinga McLaren Vale ⓘ McLaren Vale Quarries (Olivers Phosphate Quarry)
Light Regional Council Koonunga ⓘ Tom's Quarry Peter Elliott
Victoria Moorabool Shire Parwan ⓘ Parwan lava caves Birch et al. (1993)
Western Australia Meekatharra Shire Milgun Station ⓘ Milgun Variscite Mine Mineralogical Magazine 39 (1974) +1 other reference
Brazil
Minas Gerais Conselheiro Pena Barra do Cuieté ⓘ Eduardo claim Sergio Varvello collection
Galiléia Sapucaia do Norte ⓘ Sapucaia mine Cassedanne et al. (1999)
Canada
Yukon Dawson mining district ⓘ Big Fish River Robinson et al. (1992)
ⓘ Rapid Creek 150-152. +2 other references
Kulan Camp (Area A; Area 1) ⓘ Locality 7 Robinson et al. (1992)
Europe
ⓘ Albera Massif Berbain et al. (2012)
France
Occitanie Pyrénées-Orientales Céret Collioure ⓘ Pegmatite field Berbain et al. (2012)
Germany
Bavaria Upper Palatinate Neustadt an der Waldnaab District Pleystein ⓘ Trutzhofmühle DILL et al. (2008) +1 other reference
Waidhaus ⓘ Hagendorf Dill et al. (2011)
Morocco
Drâa-Tafilalet Region Ouarzazate Province Amerzgane Cercle Ouisselsate Caïdat ⓘ Angarf-South pegmatite Favreau (2012)
Russia
Murmansk Oblast ⓘ Voron'i Tundry Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 121 (2)
ⓘ Vasin-Myl'k Mt Voloshin et al. (1992)
Spain
Castile and Leon Salamanca Garcirrey ⓘ Julita quarry (Cañada pegmatite) Calvo Rebollar et al. (2022)
USA
Nevada Mineral County Candelaria Mining District ⓘ Argentum Mining Co. Mine (Northern Belle Mine; Holmes Mine) Kampf et al. (2016)
New Hampshire Grafton County Groton ⓘ Palermo No. 1 Mine NIZAMOFF et al. (2004)
ⓘ Palermo No. 2 Mine Journal of Pegmatology vol. 1 +2 other references
Orange ⓘ Keyes Mica Quarries ? Thompson et al. (2022)
South Dakota Custer County Custer Mining District Fourmile ⓘ Tip Top Mine Campbell et al. (1985)
Utah Utah County Sunshine Mining District Fairfield ⓘ Clay Canyon (TL) Palache et al. (1951) +1 other reference
ⓘ Little Green Monster Variscite Mine Rocks & Minerals (1970) +1 other reference