Legrandite (original) (raw)

A valid IMA mineral species - grandfathered

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About LegranditeHide

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Formula:

Zn2(AsO4)(OH) · H2O

Colour:

Yellow to colourless; pale yellow to colourless in transmitted light.

Lustre:

Vitreous, Sub-Vitreous, Resinous, Waxy

Specific Gravity:

3.98 - 4.01

Crystal System:

Monoclinic

Name:

Named in 1932 by Julien Drugman and Max H. Hey in honour of Mr. Louis C.A. Legrand (30 July 1861, Liège, Belgium — 27 May 1920, Brussels, Belgium), a Belgian mining engineer and mineral collector who collected the first specimen.

A secondary mineral occurring in the oxidized zones of arsenic- and zinc-bearing deposits.

The structure of legrandite (and paradamite) is characterized by the occurrence of proton transfer tunnels along crystal axes. Stability of legrandite is due to variety of hydrogen bonds, of which there are three types (linear normal one, one-acceptor; two-acceptor, linear + one weak excess one; several-acceptor, one linear + several weak additional ones). Hydrogen in legrandite is distributed among 2 OH and 2 water positions.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2365:4

7631ba76-4493-4015-a3ff-499d711206d5

IMA Classification of LegranditeHide

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

Type description reference:

Classification of LegranditeHide

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8.DC.10

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

42.6.4.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O

20.3.4

20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg

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
Leg 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 LegranditeHide

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Pronunciation:

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

Physical Properties of LegranditeHide

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Vitreous, Sub-Vitreous, Resinous, Waxy

Transparency:

Transparent, Translucent

Colour:

Yellow to colourless; pale yellow to colourless in transmitted light.

Cleavage:

Imperfect/Fair
Fair to poor on {100}

Fracture:

Irregular/Uneven

Density:

3.98 - 4.01 g/cm3 (Measured) 4.015 g/cm3 (Calculated)

Optical Data of LegranditeHide

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RI values:

_n_α = 1.675 - 1.702 _n_β = 1.690 - 1.709 _n_γ = 1.735 - 1.740

2V:

Measured: 50° , Calculated: 52° to 62°

δ = 0.060

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

Optical Extinction:

X = b; Z ^ c = 40°

Comments:

X = Y = Colourless to yellow
Z = Yellow

Chemistry of LegranditeHide

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Mindat Formula:

Zn2(AsO4)(OH) · H2O

Crystallography of LegranditeHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 12.805(2) Å, b = 7.933(1) Å, c = 10.215(2) Å
β = 104.23°

Ratio:

a:b:c = 1.614 : 1 : 1.288

Unit Cell V:

1,005.82 ų (Calculated from Unit Cell)

Morphology:

Crystals prismatic elongated [001], exhibiting dominant {110}, striated parallel to {001} and {111}, {100}, and {001}. Commonly in sprays or sheaflike aggregates.

Crystal StructureHide

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ID Species Reference Link Year Locality Pressure (GPa) Temp (K)
0000249 Legrandite McLean W J, Anthony J W, Finney J J, Laughon R B (1971) The crystal structure of legrandite American Mineralogist 56 1147-1154 1971 0 293
0020158 Legrandite Hawthorne F C, Abdu Y A, Tait K T (2013) Hydrogen bonding in the crystal structure of legrandite: Zn2(AsO4)(OH)(H2O) The Canadian Mineralogist 51 233-241 2013 Tsumeb mine, Namibia 0 293
0020671 Legrandite Jinnouchi S, Yoshiasa A, Sugiyama K, Shimura R, Arima H, Momma H, Miyawaki R (2016) Crystal structure refinements of legrandite, adamite, and paradamite: The complex structure and characteristic hydrogen bonding network of legrandite Journal of Mineralogical and Petrological Sciences 111 35-43 2016 Ojuela Mine, Mapimi, Durango, Mexico 0 293
0015593 Legrandite Pushcharovskii D Y, Pobedimskaya E A, Belov N V (1971) The crystal structure of legrandite Zn2[AsO4]OH*H2O Soviet Physics Doklady 16 419-421 1971 Ojuela mine, Mexico 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
12.36 Å (35)
6.68 Å (71)
5.93 Å (71)
4.19 Å (50)
4.08 Å (100)
3.08 Å (71)
3.03 Å (35)

Geological EnvironmentHide

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Geological Setting:

Rare secondary mineral in Zn-As bearing deposits, granite pegmatites (rare).

Type Occurrence of LegranditeHide

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General Appearance of Type Material:

Massive radiating-prismatic and rare freely developed crystals.

Place of Conservation of Type Material:

  1. The Natural History Museum, London, England, 1932,131.
  2. Harvard University, Cambridge, Massachusetts, USA, 92567.
  3. National Museum of Natural History, Washington, D.C., USA, 114810.

Geological Setting of Type Material:

Oxidized zone of an arsenic-bearing zinc deposit.

Associated Minerals at Type Locality:

Reference:

Drugman, J., Hey, M.H. (1932) Legrandite, a new zinc arsenate. Mineralogical Magazine 23: 175-718.

Other Language Names for LegranditeHide

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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. 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.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 Gordonite MgAl2(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 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

Fluorescence of LegranditeHide

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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 LegranditeHide

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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.958-959

**Anthony, John Williams, Bideaux, Richard A., Bladh, Kenneth W., Nichols, Monte C. (2000) Handbook of Mineralogy Vol. 4 - Arsenates, phosphates, vanadates. Mineral Data Publishing, Tucson, Arizona.**p.308

Jinnouchi, Satoshi, Yoshiasa, Akira, Sugiyama, Kazumasa, Shimura, Reiko, Arima, Hiroshi, Momma, Koichi, Miawaki, Ritsurou (2016) Crystal structure refinements of legrandite, adamite, and paradamite: The complex structure and characteristic hydrogen bonding network of legrandite. Journal of Mineralogical and Petrological Sciences, 111 (1) 35-43 doi:10.2465/jmps.141216

Localities for LegranditeHide

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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
New South Wales Yancowinna Co. Broken Hill district ⓘ Broken Hill
Brazil
Minas Gerais Conselheiro Pena Barra do Cuieté ⓘ Boa Vista pegmatite Canadian Mlneralogist Vol. 20 (1982) +1 other reference
Germany
Baden-Württemberg Freiburg Region Ortenaukreis Lahr/Schwarzwald Lahr/Schwarzwald Reichenbach ⓘ Silbereckle Mine Lapis (4)
Lower Saxony Goslar District Langelsheim Lautenthal ⓘ Lautenthal smelter slag locality
North Rhine-Westphalia Arnsberg Siegen-Wittgenstein Wilnsdorf ⓘ Marie Mine Schnorrer-Köhler (1987)
Greece
Attica East Attica Lavreotiki Lavrion mining district Agios Konstantinos (Kamariza) Kamariza mines (Kamareza mines) ⓘ Kamariza Dump Alfonso Frías Forcada Collection
Mercati mines ⓘ Christiana Mine
ⓘ Christiana Mine No. 132 Samouhos et al. (2024) +1 other reference
ⓘ Lavrion slag localities Schnorrer-Köhler et al. (1988)
ⓘ Legrena Cove slag locality (Legraina Cove) Gelaude et al. (1996)
ⓘ Thorikos Bay slag locality Gelaude et al. (1996)
ⓘ Vrissaki Point slag locality Gelaude et al. (1996)
Japan
Miyazaki Prefecture Nishiusuki District Takachiho ⓘ Toroku Mine Ishibashi et al (1981) +1 other reference
ⓘ Tsuzura mine Uehara et al. (2014)
Okayama Prefecture Niimi City Ohsa-osakabe ⓘ Ohgibira mine (Ogibira mine) Kusachi et al (1986)
Mexico
Chihuahua Aquiles Serdán Municipality Santa Eulalia Mining District West Camp Francisco Portillo ⓘ Potosí Mine Anthony et al. (2016)
Durango Mapimí Municipality Mapimí ⓘ Ojuela Mine Rocks & Min.: 56:247. +4 other references
ⓘ Palomas Oriente Thomas P. Moore (2008)
ⓘ San Diego Moore (2018)
Nuevo León Lampazos de Naranjo Municipality Lampazos de Naranjo (Lampazos) ⓘ Flor de Peña Mine (TL) Drugman et al. (1932) +2 other references
Namibia
Oshikoto Region Tsumeb ⓘ Tsumeb Mine (Ongopolo Mine) Gebhard (1999) +1 other reference
Poland
Lower Silesian Voivodeship Karkonosze County Gmina Janowice Wielkie ⓘ Miedzianka Ciesielczuk et al. (2003)
USA
New Jersey Sussex County Ogdensburg Sterling Hill ⓘ Sterling Mine Dunn (1995)
Zimbabwe
Midlands Gokwe North District ⓘ Sanyati Mine Vetter et al. (1999) +1 other reference