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Ludlockite

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Formula:
PbFe3+4As3+10O22
Colour:
Orange Red, orange brown
Lustre:
Greasy, Silky
Hardness:
1½ - 2
Specific Gravity:
4.40
Crystal System:
Triclinic
Name:
Named for mineral dealers Frederick Ludlow Smith III (13 August 1939 - 20 December 2014) and Charles Locke Key (1935-), who discovered the mineral Frederick Ludlow Smith and Charles Locke Key.
Note: "ludlockite" from Zarehehuran, Takap, Takht-e-Suleiman massif, West Azerbaijan Province, Iran, turned out to be the new mineral daliranite.

Visually similar to karibibite.


Hide all sections | Show all sections

Classification of LudlockiteHide

Approved
4.JA.45

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
A : Arsenites, antimonites, bismuthites; without additional anions, without H2O
45.1.14.1

45 : ACID AND NORMAL ANTIMONITES AND ARSENITES
1 : Miscellaneous
20.5.10

20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb

Physical Properties of LudlockiteHide

Greasy, Silky
Transparency:
Translucent
Colour:
Orange Red, orange brown
Streak:
light brown
Hardness:
1½ - 2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{0-11}, {0kl}
Fracture:
None observed
Density:
4.40 g/cm3 (Measured)    4.35 g/cm3 (Calculated)

Optical Data of LudlockiteHide

Type:
Biaxial (+)
RI values:
nα = 1.960 nβ = 2.055 nγ = 2.110
Birefringence:
0.15
Max Birefringence:
δ = 0.150
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
strong
Pleochroism:
Visible
Comments:
X yellow; Y deep yellow; Z orange yellow

Chemical Properties of LudlockiteHide

Formula:
PbFe3+4As3+10O22
Idealised Formula:
(Fe,Pb)As2O6

Crystallography of LudlockiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 10.41 Å, b = 11.95 Å, c = 9.86 Å
α = 113.9°, β = 99.7°, γ = 82.7°
Ratio:
a:b:c = 0.871 : 1 : 0.825
Unit Cell V:
1,103.02 ų (Calculated from Unit Cell)
Z:
9
Morphology:
Hair-like crystals

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.90 (60)
8.81 (100)
4.74 (60)
4.47 (60)
3.330 (70)
3.160 (70)
2.935 (90)
2.863 (70)
Comments:
29-774

Type Occurrence of LudlockiteHide

Synonyms of LudlockiteHide

Other Language Names for LudlockiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Germanite22 photos of Ludlockite associated with Germanite on mindat.org.
Leiteite21 photos of Ludlockite associated with Leiteite on mindat.org.
Siderite10 photos of Ludlockite associated with Siderite on mindat.org.
Stottite8 photos of Ludlockite associated with Stottite on mindat.org.
Tennantite6 photos of Ludlockite associated with Tennantite on mindat.org.
Schaurteite4 photos of Ludlockite associated with Schaurteite on mindat.org.
Zincian Siderite3 photos of Ludlockite associated with Zincian Siderite on mindat.org.
Beudantite2 photos of Ludlockite associated with Beudantite on mindat.org.
Quartz1 photo of Ludlockite associated with Quartz on mindat.org.
Parasymplesite1 photo of Ludlockite associated with Parasymplesite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.JA.05LeiteiteZn(As2O4)Mon. 2/m : P21/b
4.JA.10ReineriteZn3(AsO3)2Orth.
4.JA.15KaribibiteFe3+3(As3+O2)4(As3+2O5)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
4.JA.20KusachiiteCuBi2O4Tet.
4.JA.20SchafarzikiteFe2+Sb3+2O4Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.20TrippkeiteCu[As2O4]Tet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.25ApuaniteFe2+Fe3+4Sb3+4O12STet. 4/mmm (4/m 2/m 2/m) : P42/mbc
4.JA.30VersiliaiteFe2Fe4Sb6O16SOrth.
4.JA.35SchneiderhöhniteFe2+Fe3+3[As5O13]Tric. 1 : P1
4.JA.40Zimbabweite(Na,K)2PbAs4(Ta,Nb,Ti)4O18Orth.
4.JA.50PaulmooreitePb2[As2O5]Mon. 2/m : P21/b
4.JA.55StibivaniteSb2VO5Orth.
4.JA.60Chadwickite(UO2)[HAsO3]Tet.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.5.1CafarsiteCa5.9Mn1.7Fe3Ti3(AsO3)12 · 4-5H2OIso. m3 (2/m 3) : Pn3
20.5.2SchultenitePb(HAsO4)Mon. 2/m : P2/b
20.5.3DuftitePbCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.5.4BayldonitePbCu3(AsO4)2(OH)2Mon. 2/m : B2/b
20.5.5PhilipsbornitePbAl3(AsO4)2(OH)5 · H2OTrig.
20.5.6ArsendescloizitePbZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.5.7HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2OTric.
20.5.8ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)Mon. 2/m : B2/m
20.5.9Caryinite(Na,Pb)(Ca,Na)CaMn2+2(AsO4)3Mon. 2/m
20.5.11GabrielsonitePbFe(AsO4)(OH)Orth. mm2 : Pmc21
20.5.12CarminitePbFe3+2(AsO4)2(OH)2Orth. mmm (2/m 2/m 2/m) : Cccm
20.5.13SegnititePbFe3+3(AsO4)2(OH,H2O)6Trig. 3m (3 2/m) : R3m
20.5.14TsumcoritePbZn2(AsO4)2 · 2H2OMon.
20.5.15JamesitePb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10Tric.
20.5.16MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)Mon.
20.5.17ArsenbrackenbuschitePb2Fe3+(AsO4)2(OH)

Fluorescence of LudlockiteHide

Not fluorescent

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.

References for LudlockiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1972): 57: 1003.
Canadian Mineralogist (1994): 34: 79-89.

Internet Links for LudlockiteHide

Localities for LudlockiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Austria
 
  • Carinthia
    • Saualpe
      • Bad St Leonhard
        • Kliening
Carinthia II (1999)
Chile
 
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
Confirmed and analysed by PXRD by Dr. Tony Kampf (Curator of NHM of LA - USA)
France
 
  • Auvergne-Rhône-Alpes
    • Loire
      • La Pacaudière
        • Le Crozet
No reference listed
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
Hochleitner, R. (1986): Ludlockit aus den Schlacken von Lavrion. LAPIS 11 (6), 30
        • Lavrion (Laurion; Laurium)
Steve Rust collection
        • Oxygon area
No reference listed
        • Sounion area
Fritz Schreiber collection (PXRD-analysed by Uwe Kolitsch)
        • Thorikos area
Gelaude, Piet, van Kalmthout, Piet and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
        • Vrissaki area
Gelaude, Piet, van Kalmthout, Piet, and Rewitzer, Christian (1996) Laurion: The Minerals in the Ancient Slags, Janssen Print, Nijmegen, The Netherlands
Iran
 
  • West Azarbaijan Province (West Azerbaijan Province)
    • Takab (Takan Tepe)
http://rruff.geo.arizona.edu/doclib/hom/ludlockite.pdf http://www.mindat.org/mesg-14-151189.html
Italy
 
  • Tuscany
    • Livorno Province
      • Campigliese (Campiglia Mountains; Campiglia Ridge)
        • Campiglia Marittima
Int. Assoc. of Collectors of Slag Minerals, 10 (2), 4-6.
        • Sassetta
          • Canina Valley
Jansen, H. & van den Berg, W. (1998): Slakkenmineralen in Toscane (Italië). Gea, no. 4, 109-117 (in Dutch).
      • Piombino
Cerutti, G., Preite, D. (1995): Mineralien der etruskischen Schlacken von Baratti, Toskana. Lapis, 20, 4, 13-18 and 50.
Japan
 
  • Kyushu Region
    • Oita prefecture
      • Saiki City
Specimens on sale at Osaka show, 2010.
Namibia (TL)
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
[Nickel & Nichols, 1991 "Mineral Reference Manual": 123; Rocks & Min.: 62:440.
South Africa
 
  • Limpopo Province
    • Sekhukhune District
      • Marble Hall
Robert O. Meyer collection; Dr. Hans Börner collection;
Mineral and/or Locality  
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