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Liddicoatite

A material that is NOT an approved mineral species
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About LiddicoatiteHide

09975400014946386164323.jpg
Richard Liddicoat
Formula:
Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Colour:
Light-brown, pink to red, green, blue, rarely white.
Lustre:
Vitreous
Hardness:
Specific Gravity:
3.02
Crystal System:
Trigonal
Name:
Named for Richard T. Liddicoat (1918-2002), gemologist and president of the Gemological Institute of America
Tourmaline Group. Elbaite-Liddicoatite Series. Close to UM2008-52-SiO:AlBCaFFeHLiMgNa.

Note on the nomenclature: the "liddicoatite" holotype (Dunn et al., 1977) is F-dominant on the W-site, although the originally suggested formula was OH-dominant. Therefore the type material has been redefined as fluor-liddicoatite (Henry et al., 2011); "liddicoatite" is currently a non-approved species.

The sample characterised in detail by Aurisicchio et al. (1999) is OH-dominant.
Material analysed by Breaks et al. (2008) and Ertl et al. (2020) is also OH-dominant and therefore liddicoatite according to the new nomenclature.

NOTE: All localities listed here under "liddicoatite" should be checked if they are to be assigned to fluor-liddicoatite or liddicoatite (or elbaite; see Bosi et al., 2021).





Unique IdentifiersHide

Mindat ID:
2395
Long-form identifier:
mindat:1:1:2395:1
GUID
(UUID V4):
71a244e7-4e27-4193-957e-1ba9e3d73f5a

Classification of LiddicoatiteHide

9.CK.05

9 : SILICATES (Germanates)
C : Cyclosilicates
K : [Si6O18]12- 6-membered single rings, with insular complex anions
Dana 7th ed.:
61.3.1.4
61.3.1.2

61 : CYCLOSILICATES Six-Membered Rings
3 : Six-Membered Rings with borate groups
17.5.9

17 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of LiddicoatiteHide

Vitreous
Transparency:
Transparent, Translucent
Comment:
on fractures
Colour:
Light-brown, pink to red, green, blue, rarely white.
Streak:
Light brown, white
Hardness:
7½ on Mohs scale
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Poor on {0001}
Fracture:
Irregular/Uneven, Conchoidal
Density:
3.02 g/cm3 (Measured)    3.05 g/cm3 (Calculated)

Optical Data of LiddicoatiteHide

Type:
Uniaxial (-)
Comments:
Probably similar to data for fluor-liddicoatite.

Chemistry of LiddicoatiteHide

Mindat Formula:
Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Common Impurities:
Mn,Fe,Ti,Mg,Na,H2O

Crystallography of LiddicoatiteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Cell Parameters:
a = 15.880(1) Å, c = 7.115(1) Å
Ratio:
a:c = 1 : 0.448
Unit Cell V:
1,553.84 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Stout prismatic
Comment:
Ran*e: 15.880(1)-15.882(1), 7.115(1)-7.118(1) A.

Geological EnvironmentHide

Geological Setting:
Pegmatites

Other Language Names for LiddicoatiteHide

Simplified Chinese:钙锂电气石
Spanish:Liddicoatita
Traditional Chinese:鈣鋰電氣石

Relationship of Liddicoatite to other SpeciesHide

Other Members of this group:
AdachiiteCaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Alumino-oxy-rossmanite◻Al3Al6(Si5AlO18)(BO3)3(OH)3OTrig. 3m : R3m
BosiiteNaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Celleriite◻(Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Chromium-draviteNaMg3Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Chromo-alumino-povondraiteNaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
DarrellhenryiteNa(Al2Li)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
DutrowiteNa(Fe2+2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Ferro-bosiiteNaFe3+3(Al4Fe2+2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
FeruviteCaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Fluor-buergeriteNaFe3+3Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
Fluor-draviteNaMg3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-elbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-liddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-rossmanite◻(Al2Li)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m (3 2/m) : R3m
Fluor-schorlNaFe2+3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-tsilaisiteNaMn2+3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Fluor-uviteCaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
Foitite◻(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
LucchesiiteCaFe2+3 Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Magnesio-dutrowiteNa(Mg2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Magnesio-foitite◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Magnesio-lucchesiiteCaMg3Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
MaruyamaiteK(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
OleniteNaAl3Al6(Si6O18)(BO3)3O3(OH)Trig. 3m : R3m
Oxy-chromium-draviteNaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Oxy-foitite◻(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m (3 2/m) : R3m
Oxy-rossmanite◻(Li0.5Al2.5)Al6(Si6O18)(BO3)3(OH)3O
Oxy-schorlNa(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Oxy-uviteCaMg3Al6(Si6O18)(BO3)3(OH)3O
Oxy-vanadium-draviteNaV3(V4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
PovondraiteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
PrincivalleiteNa(Mn2Al)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Rossmanite◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
SchorlNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
TsilaisiteNaMn2+3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
UM2000-64-SiO:BFeHKMg(K,Na)Fe3+3(Mg2Fe3+4)Si6O18(BO3)3(OH)3O
UM2008-52-SiO:AlBCaFFeHLiMgNa(Ca,Na,◻)(Al,Li,Fe,Mg)3Al6[Si6O18](BO3)3(OH,O)3(F,O)
Unnamed (F analogue of feruvite)CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3F
Unnamed (Pb-analogue of Fluor-liddicoatite)Pb(Li2Al)Al6(Si6O18)(BO3)3(OH)3F
UviteCaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
Vanadio-oxy-chromium-draviteNaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
Vanadio-oxy-draviteNaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Liddicoatite associated with Londonite(Cs,K,Rb)Al4Be4(B,Be)12O28
2 photos of Liddicoatite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

9.CK.Fluor-schorlNaFe2+3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.DarrellhenryiteNa(Al2Li)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.AdachiiteCaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.BosiiteNaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.DutrowiteNa(Fe2+2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.Celleriite◻(Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.PrincivalleiteNa(Mn2Al)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.Alumino-oxy-rossmanite◻Al3Al6(Si5AlO18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.Ferro-bosiiteNaFe3+3(Al4Fe2+2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.Magnesio-dutrowiteNa(Mg2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Fluor-buergeriteNaFe3+3Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
9.CK.05Chromium-draviteNaMg3Cr3+6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05FeruviteCaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Foitite◻(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05OleniteNaAl3Al6(Si6O18)(BO3)3O3(OH)Trig. 3m : R3m
9.CK.05PovondraiteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05SchorlNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Magnesio-foitite◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Rossmanite◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05TsilaisiteNaMn2+3Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Oxy-vanadium-draviteNaV3(V4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Oxy-rossmanite◻(Li0.5Al2.5)Al6(Si6O18)(BO3)3(OH)3O
9.CK.05Luinaite-(OH)NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)Mon. m : Bm
9.CK.05Fluor-elbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Chromo-alumino-povondraiteNaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Fluor-draviteNaMg3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Oxy-schorlNa(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Fluor-liddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Unnamed (F analogue of feruvite)CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3F
9.CK.05UM2000-64-SiO:BFeHKMg(K,Na)Fe3+3(Mg2Fe3+4)Si6O18(BO3)3(OH)3O
9.CK.05Oxy-chromium-draviteNaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
9.CK.05Fluor-tsilaisiteNaMn2+3Al6(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Vanadio-oxy-chromium-draviteNaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O Trig. 3m : R3m
9.CK.05Fluor-uviteCaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3FTrig. 3m : R3m
9.CK.05Vanadio-oxy-draviteNaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05MaruyamaiteK(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05LucchesiiteCaFe2+3 Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05Oxy-foitite◻(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3OTrig. 3m (3 2/m) : R3m
9.CK.05Oxy-uviteCaMg3Al6(Si6O18)(BO3)3(OH)3O
9.CK.05Magnesio-lucchesiiteCaMg3Al6(Si6O18)(BO3)3(OH)3OTrig. 3m : R3m
9.CK.05UviteCaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
9.CK.05Fluor-rossmanite◻(Al2Li)Al6(Si6O18)(BO3)3(OH)3FTrig. 3m (3 2/m) : R3m
9.CK.10Abenakiite-(Ce)Na26Ce6(Si6O18)(PO4)6(CO3)6(SO2)OTrig. 3 : R3
9.CK.15ScawtiteCa7(Si3O9)2CO3 · 2H2OMon. 2/m
9.CK.20Steenstrupine-(Ce)Na14Mn2+2Fe3+2Ce6Zr(Si6O18)2(PO4)6(PO3OH)(OH)2 · 2H2OTrig. 3m (3 2/m) : R3m
9.CK.20Thorosteenstrupine(Ca,Th,Mn)3Si4O11F · 6H2O

Other InformationHide

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 LiddicoatiteHide

References for LiddicoatiteHide

Reference List:

Localities for LiddicoatiteHide

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

- 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.
Brazil
 
Queiroz (2016)
  • Minas Gerais
    • Coronel Murta
erroneously reported [MinRec 33:209]
  • Tocantins
    • São Salvador do Tocantins
Hudson et al. (n.d.)
Canada
 
  • Manitoba
    • Lac-du-Bonnet area
      • Cat Lake - Winnipeg River pegmatite field
        • Donner Lake
Teertstra +1 other reference
  • Ontario
    • Kenora District
      • Fort Hope
Breaks et al. (2008)
      • Root Lake pegmatite group
        • Root Lake Area
Tindle et al. (2005)
Tindle et al. (2005)
Czech Republic
 
  • South Bohemian Region
    • Český Krumlov District
      • Černá v Pošumaví
        • Bližná
Novák et al. (1999)
  • Vysočina Region
    • Žďár nad Sázavou District
Novák +3 other references
Flégr et al. (2017)
Italy
 
  • Lombardy
    • Brescia Province
      • Upper Val Saviore
        • Mt. Foppa
          • Forcel Rosso Gully (Forcel Rosso Pass)
Pezzotta +1 other reference
Madagascar
 
  • Amoron'i Mania
    • Ambatofinandrahana District
Moore (2008)
      • Mandrosonoro
        • Ambatovita
Rocks & Minerals 82:146 +1 other reference
    • Ambositra
      • Sahatsiho Ambohimanjaka
        • Manandona Valley
Pezzotta et al. (1997)
  • Anosy
    • Amboasary Sud District
      • Tranomaro
- (2004)
  • Haute Matsiatra
    • Ikalamavony District
      • Tanamarina Bekisopa
Pezzotta (2011)
    • Vohibato District
      • Alakamisy Itenina
Aurisicchio et al. (1999)
  • Vakinankaratra
    • Antsirabe II District
      • Ibity
        • Sahatany Valley
Pezzotta (2011)
      • Mangarano
Ranorosoa (1986)
Ranorosoa (1986)
      • Sahanivotry Manandona
Ranorosoa (1986)
    • Betafo District
      • Ambohimanambola
Wilson (1989) +2 other references
      • Andrembesoa
        • Tetezantsio-Andoabatokely Pegmatite Field
RRUFF ID: R080064- Not confirmed
Dirlam et al. (2002)
Dunn et al. (1977)
Mozambique
 
  • Nampula Province
Wang +5 other references
Nigeria
 
  • Niger
    • Suleja
Dirlam et al. (2002)
  • Oyo
    • Atisbo
Giller BS (2003)
Dirlam et al. (2002)
Norway
 
  • Nordland
    • Alstahaug
      • Sandnessjøen
        • Botn
Larsen et al. (1999)
Poland
 
  • Lower Silesian Voivodeship
    • Dzierżoniów County
      • Piława Górna
        • DSS Piława Górna Quarry
Pieczka et al. (2017) +1 other reference
Pieczka et al. (2012)
Rubio-Ordóñez et al. (2019)
Portugal
 
  • Guarda
    • Guarda
      • Gonçalo
www.mindat.org (n.d.)
Republic of the Congo
 
Russia
 
  • Zabaykalsky Krai
    • Krasnochikoysky District
      • Krasnyi Chikoy
        • Malkhan pegmatite field
Fialova et al. (2013)
Sri Lanka
 
  • Sabaragamuwa Province
    • Ratnapura District
      • Ratnapura
Ceylon Aluvial Mine (Book, Co. 2002)
Sweden
 
  • Stockholm County
    • Haninge
      • Utö
        • Utö Mines
Selway et al. (2002)
Tanzania
 
  • Morogoro Region
Giller BS (2003)
USA
 
  • Alaska
    • Southeast Fairbanks Census Area
      • Delta River Mining District
Periodico di Mineralogi (2011)
Vietnam
 
  • Yên Bái Province
    • Lục Yên District
Mineralogical Record: 36 (3) +1 other reference
 
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