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Landauite

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Lev Davidovich Landau
Formula:
NaMnZn2(Ti,Fe)6Ti12O38
System:
Trigonal
Colour:
Black
Hardness:
Name:
For Lev Davidovich Landau (born January 22, 1908 – died April 1, 1968) was a prominent Soviet physicist who made fundamental contributions to many areas of theoretical physics.

Classification of Landauite

Approved
4.CC.40

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations
8.5.1.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
5 : AB21O38
7.9.31

7 : Oxides and Hydroxides
9 : Oxides of Ti
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http://www.mindat.org/min-2317.html
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First Recorded Occurrence of Landauite

Place of Conservation of First Recorded Material:
Fersman museum
Year of Discovery:
1966
Geological Setting of First Recorded Material:
Albite veinlets along the contact of quartz syenite and syenite pegmatite in an alkaline massif.
Associated Minerals at First Recorded Locality:

Physical Properties of Landauite

Sub-Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Black
Streak:
Gray
Hardness (Mohs):
Hardness Data:
Measured
Fracture:
Conchoidal
Density:
4.42 g/cm3 (Measured)    4.46 g/cm3 (Calculated)

Crystallography of Landauite

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 10.366(7) Å, c = 20.77(1) Å
Ratio:
a:c = 1 : 2.004
Unit Cell Volume:
V 1,932.81 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Prismatic crystals, irregular grains to 1 mm and fine-grained aggregates.
Twinning:
Commonly as complex cyclic twins.

Optical Data of Landauite

Type:
Uniaxial (-)
RI values:
nω = 2.388 nε = 2.373
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Strong
Comments:
X=Z= bottle green
Y= green

Chemical Properties of Landauite

Formula:
NaMnZn2(Ti,Fe)6Ti12O38
Essential elements:
All elements listed in formula:

Relationship of Landauite to other Species

Other Members of Group:
AlmeidaitePbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O)
Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38
Crichtonite(Sr,La,Ce,Y)(Ti,Fe3+,Mn)21O38
Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38
Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)
Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38
Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe23+(Ti,Fe3+)18O38
Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Mapiquiroite(Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38
Mathiasite(K, Ba, Sr)(Zr, Fe)(Mg,Fe)2 (Ti,Cr,Fe)18O38
Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe23+ (Ti,Fe3+)18O38
PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38
Romanite(◻,Pb,Ca)UFe22+(Ti,Fe3+)6Ti12O38
SenaitePb(Ti,Fe,Mn)21O38
Unnamed (HBU UK-4)NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38
4.CC.05ChrombismiteBi16CrO27
4.CC.10FreudenbergiteNa2(Ti,Fe)8O16
4.CC.15GrossiteCaAl4O7
4.CC.20ChlormayeniteCa12Al14O32Cl2
4.CC.25YafsoaniteCa3Zn3(TeO6)2
4.CC.30Latrappite(Ca,Na)(Nb,Ti,Fe)O3
4.CC.30LueshiteNaNbO3
4.CC.30NatroniobiteNaNbO3
4.CC.30PerovskiteCaTiO3
4.CC.30BarioperovskiteBaTiO3
4.CC.30LakargiiteCa(Zr,Sn,Ti)O3
4.CC.30MegawiteCaSnO3
4.CC.35Loparite-(Ce)(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O3
4.CC.35MacedonitePbTiO3
4.CC.35TausoniteSrTiO3
4.CC.35Isolueshite(Na,La,Ca)(Nb,Ti)O3
4.CC.40Crichtonite(Sr,La,Ce,Y)(Ti,Fe3+,Mn)21O38
4.CC.40Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38
4.CC.40Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
4.CC.40Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)
4.CC.40Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
4.CC.40Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
4.CC.40Mathiasite(K, Ba, Sr)(Zr, Fe)(Mg,Fe)2 (Ti,Cr,Fe)18O38
4.CC.40SenaitePb(Ti,Fe,Mn)21O38
4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38
4.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38
4.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe23+(Ti,Fe3+)18O38
4.CC.45DiaoyudaoiteNaAl11O17
4.CC.45HawthorneiteBa(MgTi3Cr4Fe4)O19
4.CC.45Hibonite(Ca,Ce)Al12O19
4.CC.45LindqvistitePb2Mn2+Fe16O27
4.CC.45Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19
4.CC.45PlumboferritePb2Fe3+11-xMnx2+O19-2x, x = 1/3
4.CC.45YimengiteK(Cr,Ti,Fe,Mg)12O19
4.CC.45HaggertyiteBa[Fe62+Ti5Mg]O19
4.CC.45NežilovitePbZn2(Mn4+,Ti4+)2Fe83+O19
4.CC.45BatiferriteBa[Ti2Fe83+Fe22+]O19
4.CC.45Hibonite-(Fe)(Fe,Mg)Al12O19
4.CC.45BarioferriteBaFe123+O19
4.CC.50Jeppeite(K,Ba)2(Ti,Fe)6O13
4.CC.55ZenzénitePb3(Fe,Mn)4Mn3O13
4.CC.60Mengxianminite(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29
7.9.1HongquiiteTiO
7.9.2RutileTiO2
7.9.3AnataseTiO2
7.9.4BrookiteTiO2
7.9.5GeikieliteMgTiO3
7.9.6PerovskiteCaTiO3
7.9.7KassiteCaTi2O4(OH)2
7.9.8TausoniteSrTiO3
7.9.9Crichtonite(Sr,La,Ce,Y)(Ti,Fe3+,Mn)21O38
7.9.10Lucasite-(Ce)CeTi2(O,OH)6
7.9.11Hibonite(Ca,Ce)Al12O19
7.9.12Yttrocrasite-(Y)(Y,Th,Ca,U)(Ti,Fe)2(O,OH)6
7.9.13PyrophaniteMn2+TiO3
7.9.14IwakiiteMn2+Fe23+O4
7.9.15IlmeniteFe2+TiO3
7.9.16PseudobrookiteFe2TiO5
7.9.17UlvöspinelFe2TiO4
7.9.18PseudorutileFe2Ti3O9
7.9.19FreudenbergiteNa2(Ti,Fe)8O16
7.9.20KennedyiteMgFe23+Ti3O10
7.9.21Armalcolite(Mg,Fe2+)Ti2O5
7.9.22Högbomite(Mg,Fe)2(Al,Ti)5O10
7.9.23Qandilite(Mg,Fe)2(Ti,Fe,Al)O4
7.9.24Cafetite(Ca,Mg)(Fe,Al)2Ti4O12 · 4H2O
7.9.25Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
7.9.26Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
7.9.27PrideriteK(Ti74+Fe3+)O16
7.9.28Jeppeite(K,Ba)2(Ti,Fe)6O13
7.9.29AnkangiteBa(Ti,V3+,Cr)8O16
7.9.30Ecandrewsite(Zn,Fe2+,Mn2+)TiO3

Other Names for Landauite

Name in Other Languages:
German:Landauit
Spanish:Landauita

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.

References for Landauite

Reference List:
American Mineralogist (1966): 51: 546.

Canadian Mineralogist (1978): 16: 63-65.

Doklady Akademii Nauk SSSR: 166: 1420-1421.

Internet Links for Landauite

Localities for Landauite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Can. Museum of Nature unpublished data XRD & WDS
Germany
 
  • Baden-Württemberg
    • Odenwald
      • Eberbach
        • Katzenbuckel
Stahle, V., Koch, M., McCammon, C. A., Mann, U. & Markl, G. (2002): Occurrence of low-Ti and high-Ti freudenbergite in alkali syenite dikes from the Katzenbuckel volcano, southwestern Germany. Canadian Mineralogist 40, 1609-1627.
Mongolia
 
  • Gobi Desert
N.V. Vladykin data
Republic of Macedonia
 
  • Veles
    • Nežilovo
      • Jakupica Mts
Gunnar Farber
Russia
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Buriatia (Buryatia)
        • Mama River Basin
          • Maigunda River
[MinRec 32:42]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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