Gormanite (original) (raw)

A valid IMA mineral species

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About GormaniteHide

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Formula:

(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O

Colour:

Blue green to dark green

Lustre:

Sub-Vitreous, Greasy

Specific Gravity:

3.10 - 3.13

Name:

Named by B. Darko Sturman, Joseph A. Mandarino, Mary E. Mrose, and P. J. Dunn in 1981 after Professor Donald Herbert Gorman [b. 1922 Fredericton, New Brunswick, Canada; d. 2020 Toronto, Ontario] exploration mineralogist and professor of mineralogy of the University of Toronto, Canada. Pronounced GAWR•MENAIT.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:1729:5

364d7882-dcdd-407f-aa11-03f178404823

IMA Classification of GormaniteHide

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IMA Formula:

Fe2+3Al4(PO4)4(OH)6 · 2H2O

Type description reference:

Sturman, B. D., Mandarino, J. A., Mrose, M. E., Dunn, P. J. (1981) Gormanite, Fe2+3Al4(PO4)4(OH)6·2H2O, the ferrous analogue of souzalite, and new data for souzalite. The Canadian Mineralogist, 19 (3) 381-387

Classification of GormaniteHide

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8.DC.45

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

42.9.2.2

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O

19.14.32

19 : Phosphates
14 : Phosphates of Fe 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.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol Source Reference
Gm IMA–CNMNC Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Gm The Canadian Mineralogist (2019) The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Pronunciation of GormaniteHide

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Pronunciation:

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

Physical Properties of GormaniteHide

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Transparency:

Transparent, Translucent

Colour:

Blue green to dark green

Cleavage:

Poor/Indistinct
{001}

Density:

3.10 - 3.13 g/cm3 (Measured) 3.11(1) g/cm3 (Calculated)

Optical Data of GormaniteHide

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RI values:

_n_α = 1.619 _n_β = 1.653 _n_γ = 1.660

2V:

Measured: 53° , Calculated: 48°

δ = 0.041

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

Optical Extinction:

Z ∧ b = 14°; X ⊥ {001}.

Comments:

X = colorless; Y = blue, Z = colorless.

Chemistry of GormaniteHide

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Mindat Formula:

(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O

Crystallography of GormaniteHide

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Cell Parameters:

a = 11.77(1) Å, b = 5.11(1) Å, c = 13.61(1) Å
α = 90.45°, β = 99.15°, γ = 90.05°

Ratio:

a:b:c = 2.303 : 1 : 2.663

Unit Cell V:

808.13 ų (Calculated from Unit Cell)

Morphology:

Thick acicular crystals, usually in tight divergent groups.

Blades, elongated on [010] with large {001}. Other forms include {100}, {102}, {102}, and {010}.

Twinning:

Composition plane {001}. Twin axis [010].

Comment:

Triclinic, pseudomonoclinic. Point Group: 1 or 1; Space Group: P1 or P1

Crystal StructureHide

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ID Species Reference Link Year Locality Pressure (GPa) Temp (K)
0019923 Gormanite Le Bail A, Stephens P W, Hubert F (2003) A crystal structure for the souzalite/gormanite series from synchrotron powder diffraction data European Journal of Mineralogy 15 719-723 2003 Rapid Creek, Yukon, Canada 0 293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Radiation - Copper Kα

Data Set:

Data courtesy of RRUFF project at University of Arizona, used with permission.

Powder Diffraction Data:

d-spacing Intensity
6.70 Å (100)
4.79 Å (60)
3.39 Å (100)
3.34 Å (70)
3.16 Å (70)
3.13 Å (80)
3.10 Å (60)
2.55 Å (70)

Comments:

ICDD 36-403; also 33-638.

Geological EnvironmentHide

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Geological Setting:

Late stage mineralization in granite pegmatite.

Type Occurrence of GormaniteHide

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General Appearance of Type Material:

Blue-green elongate crystals (up to 3 x 0.5 x 0.1 mm) in radial aggregates and as blade-like crystals.

Place of Conservation of Type Material:

Royal Ontario Museum, Toronto, Ontario, Canada, M35123, M35124, M37368.
National Museum of Natural History, Washington, D.C., USA, 137494, 137495, 145741.

Geological Setting of Type Material:

Veins in phosphatic iron stones. Formed at low temperature.

Associated Minerals at Type Locality:

Reference:

STURMAN, B.D., MANDARINO, J.A., MROSE, M.E. & DUNN, P.J. (1981): Gormanite, Fe2+3Al4(PO4)4(OH)6$2H2O, the ferrous analogue of souzalite, and new data for souzalite. Canadian Mineralogist 19, 381-387.

Synonyms of GormaniteHide

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Other Language Names for GormaniteHide

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Relationship of Gormanite to other SpeciesHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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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. Ianbruceite Zn2(AsO4)(OH) · 3H2O Mon. 2/m : _P_21/b
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 Earlshannonite Mn2+Fe3+2(PO4)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.15 Cobaltarthurite CoFe3+2(AsO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.15 Arthurite CuFe3+2(AsO4)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 Bendadaite Fe2+Fe3+2(AsO4)2(OH)2 · 4H2O Mon. 2/m : _P_21/b
8.DC.17 Kleemanite ZnAl2(PO4)2(OH)2 · 3H2O Mon.
8.DC.20 Magnesiobermanite MgMn3+2(PO4)2(OH)2 · 4H2O Mon. 2 : _P_21
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.22 Kovdorskite Mg2(PO4)(OH) · 3H2O Mon. 2/m : _P_21/b
8.DC.25 Zincostrunzite ZnFe3+2(PO4)2(OH)2 · 6.5H2O Tric. 1 : _P_1
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 Ferristrunzite Fe3+Fe3+2(PO4)2(OH)3 · 5H2O Tric.
8.DC.25 Strunzite Mn2+Fe3+2(PO4)2(OH)2 · 6H2O Tric. 1 : _P_1
8.DC.25 Ferrostrunzite Fe2+Fe3+2(PO4)2(OH)2 · 6H2O Tric.
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 Maghrebite MgAl2(AsO4)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 Ushkovite MgFe3+2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Laueite Mn2+Fe3+2(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 Sigloite Fe3+Al2(PO4)2(OH)3 · 7H2O 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.30 Mangangordonite Mn2+Al2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Stewartite Mn2+Fe3+2(PO4)2(OH)2 · 8H2O Tric. 1 : _P_1
8.DC.30 Gordonite MgAl2(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 Pseudolaueite Mn2+Fe3+2(PO4)2(OH)2 · 8H2O Mon. 2/m : _P_21/b
8.DC.32 Kamarizaite Fe3+3(AsO4)2(OH)3 · 3H2O Tric. 1 : _P_1
8.DC.32 Tinticite Fe3+3(PO4)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 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 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.50 Wavellite Al3(PO4)2(OH,F)3 · 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 Cloncurryite Cu0.5(VO)0.5Al2(PO4)2F2 · 5H2O Mon. 2/m : _P_21/b
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.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

Fluorescence of GormaniteHide

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Other InformationHide

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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 GormaniteHide

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Reference List:

Sturman, B. D., Mandarino, J. A., Mrose, M. E., Dunn, P. J. (1981) Gormanite, Fe2+3Al4(PO4)4(OH)6·2H2O, the ferrous analogue of souzalite, and new data for souzalite. The Canadian Mineralogist, 19 (3) 381-387

Chandrasekhar, A.V., Ramanaiah, M.V., Reddy, B.J., Reddy, Y.P., Rao, P.S., and Ravikumar, R.V.S.S.N. (2003) Optical and EPR studies of iron bearing phosphate minerals: satterylite and gormanite from Yukon Territory, Canada. Spectrochimnimca Acta A, 2115–2121.

Localities for GormaniteHide

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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.

Argentina
San Luis Province San Martín Department ⓘ Cema pegmatite Roda-Robles et al. (2012)
Austria
Carinthia Spittal an der Drau District Millstatt lake ⓘ Hahnenkofel G. Niedermayr: Carinthia II 187./107.:176 (1997)
ⓘ Laggerhof Niedermayr et al. (1995)
Reißeck Kolbnitz ⓘ Zwenbergergraben Walter et al. (2020)
Penk Zwenberger Graben ⓘ Pegmatite occurrence Walter et al. (2020)
Spittal an der Drau Wolfsberg ⓘ Feldspar quarry Pichler (2009)
Brazil
Minas Gerais Divino das Laranjeiras ⓘ Linópolis Menezes (n.d.)
ⓘ João Firmino claim Menezes Filho et al. (2019)
Mendes Pimentel ⓘ Gentil claim Pers. Comm. from Paulo Anselmo Matioli +1 other reference
Canada (TL)
Yukon Dawson mining district ⓘ Big Fish River (TL) Sturman et al. (1981) +1 other reference
ⓘ Locality 15
ⓘ Rapid Creek (TL) 150-152. +3 other references
Kulan Camp (Area A; Area 1) ⓘ Locality 7 Robinson et al. (1992)
ⓘ Stoneman Camp Robinson et al. (1992)
ⓘ Locality 9 Robinson et al. (1992)
Europe
ⓘ Albera Massif Berbain et al. (2012)
France
Occitanie Aude Carcassonne Salsigne ⓘ Salsigne mine Forner et al. (1997)
Pyrénées-Orientales Céret Collioure ⓘ Pegmatite field Berbain et al. (2012)
Namibia
Erongo Region Karibib Constituency Abbabis Farm 70 ⓘ No. 1 pegmatite Förch (1998)
Tsaobismund Farm 85 ⓘ Brockmann's pegmatite von Bezing (2007)
Portugal
Castelo Branco Idanha-a-Nova União de Freg de Segura e Zebreira ⓘ Segura Mines (Segura mining field) Neiva et al. (2000) +1 other reference
Rwanda
Western Province Ngororero District Muhororo ⓘ Buranga pegmatite Färber (n.d.)
Spain
Castile and Leon Salamanca Aldehuela de la Bóveda ⓘ Aldehuela de la Bóveda pegmatite Roda et al. (2001)
Garcirrey ⓘ Julita quarry (Cañada pegmatite) Encarnación Roda-Robles (2007)
Golpejas Golpejas Mining group ⓘ Tita Mine Calvo Rebollar (2015)
USA
Arizona Cochise County ⓘ Bisbee Graeme (1993) +1 other reference
New Hampshire Cheshire County Walpole ⓘ Chickering Mine P. Cristofono et al. (2011)
Grafton County Groton ⓘ Charles Davis Mine Rocks & Min. 80:251
ⓘ Palermo No. 1 Mine Whitmore et al. (2004) +1 other reference
ⓘ Palermo No. 2 Mine Geological Society of America Abstracts ... +2 other references
Sullivan County Newport ⓘ George Frank Smith Quarry King (n.d.)
North Carolina Randolph County Staley ⓘ Staley Mine (Gerhardt Mine) ? Belmont Abbey College Collection