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Ludlamite

Big Photo

Blackbird Mine, Blackbird District, Lemhi Co., Idaho, USA
© Peter Haas

Show Ludlamite Photos (49)
Formula:
(Fe,Mn,Mg)
 
3
(PO
 
4
)
 
2
·4H
 
2
O
System:MonoclinicColour:Apple-green to bright ...
Lustre:VitreousHardness:3½
Name:For Henry Ludlam (1824-1880), English mineral collector, London, England.


A secondary phosphate mineral in complex granitic pegmatites.

Classification of Ludlamite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/C.10-10
Nickel-Strunz 10th (pending) edition ID:8.CD.20

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2
Dana 8th edition ID:40.3.5.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
Hey's CIM Ref.:19.12.35

19 : Phosphates
12 : Phosphates of Mn
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Type Occurrence of Ludlamite

Type Locality:Wheal Jane (Falmouth Consolidated; Wheal Whidden; Wheal Nangiles; Wheal Tremayne), Baldhu, Camborne - Redruth - St Day District, Cornwall, England, UK
Place of Conservation of Type Material:The Natural History Museum, London, England: #44187.
Year of Discovery:1877

Occurrences of Ludlamite

Geological Setting:Complex granitic pegmatites as a alteration product under reducing conditions.

Physical Properties of Ludlamite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Comment:Pearly on cleavage {001}
Colour:Apple-green to bright green; nearly colourless in transmitted light.
Streak:Pale greenish white
Hardness (Mohs):3½
Cleavage:Perfect
Perfect on {001}, indistinct on {100}
Density (measured):3.12 - 3.19 g/cm3
Density (calculated):3.176 g/cm3

Crystallography of Ludlamite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b (P1 1 21/b) [P21/c] {P1 21/c 1} {P21/a}
Cell Parameters:a = 10.541(5) Å, b = 4.646(4) Å, c = 9.324(5) Å
β = 100.52°
Ratio:a:b:c = 2.269 : 1 : 2.007
Unit Cell Volume:V 448.95 ų (Calculated from Unit Cell)
Z:2
Morphology:Crystals tabular {001}, exhibiting forms {100}, {110}, {001}, and {_111}, and others. Form parallel groups at times. Also occurs granular, massive.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Ludlamite

Type:Biaxial (+)
RI values: nα = 1.650 - 1.653 nβ = 1.669 - 1.675 nγ = 1.688 - 1.697
2V:Measured: 82° , Calculated: 86° to 88°
Maximum Birefringence:δ = 0.038 - 0.044

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v perceptible

Chemical Properties of Ludlamite

Formula:
(Fe,Mn,Mg)
 
3
(PO
 
4
)
 
2
·4H
 
2
O
Essential elements:Fe, H, O, P
All elements listed in formula:Fe, H, Mg, Mn, O, P

Relationship of Ludlamite to other Species

Common Associates:
WhitlockiteVivianiteTriploiditeTripliteTriphylite
SideritePhosphoferriteFairfielditeApatite
Related Minerals - Nickel-Strunz Grouping):
8.CD.05Kolbeckite
ScPO
 
4
·2H
 
2
O
8.CD.05Metavariscite
AlPO
 
4
·2H
 
2
O
8.CD.05Phosphosiderite
FePO
 
4
·2H
 
2
O
8.CD.10Mansfieldite
AlAsO
 
4
·2H
 
2
O
8.CD.10Scorodite
Fe
3+
 
AsO
 
4
·2H
 
2
O
8.CD.10Strengite
FePO
 
4
·2H
 
2
O
8.CD.10Variscite
AlPO
 
4
·2H
 
2
O
8.CD.10Yanomamite
InAsO
 
4
·2H
 
2
O
8.CD.15Parascorodite
Fe
3+
 
AsO
 
4
·2H
 
2
O
8.CD.25Sterlinghillite
Mn
 
3
(AsO
 
4
)
 
2
·4H
 
2
O
8.CD.30Rollandite
Cu
 
3
(AsO
 
4
)
 
2
·4H
 
2
O
Related Minerals - Hey's Index Grouping:
19.12.1Metaswitzerite
Mn
 
3
(PO
 
4
)
 
2
·4H
 
2
O
19.12.2Bermanite
Mn
2+
 
Mn
3+
2
[OH|PO
 
4
]
 
2
 · 4H
 
2
O
19.12.3Natrophilite
NaMn
2+
 
[PO
 
4
]
19.12.4Sidorenkite
Na
 
3
Mn
2+
 
[PO
 
4
|CO
 
3
]
19.12.5Niahite
(NH
 
4
)(Mn
2+
 
,Mg)[PO
 
4
] · H
 
2
O
19.12.6Robertsite
Ca
 
3
Mn
3+
4
[(OH)
 
3
|(PO
 
4
)
 
2
]
 
2
 · 3H
 
2
O
19.12.7Pararobertsite
Ca
 
2
Mn
3+
3
[O
 
2
|(PO
 
4
)
 
3
] · 3H
 
2
O
19.12.8Sinkankasite
H
 
2
Mn
2+
 
Al[OH|(PO
 
4
)
 
2
] · 6H
 
2
O
19.12.9Mangangordonite
Mn
2+
 
Al
 
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.12.10Heterosite
(Fe
3+
 
,Mn
3+
 
)[PO
 
4
]
19.12.11Purpurite
(Mn
3+
 
,Fe
3+
 
)[PO
 
4
]
19.12.12Wolfeite
(Fe
2+
 
,Mn
2+
 
)
 
2
[OH|PO
 
4
]
19.12.13Triploidite
(Mn
2+
 
,Fe
2+
 
)
 
2
[OH|PO
 
4
]
19.12.14Lipscombite
(Fe
2+
 
,Mn
2+
 
)Fe
3+
2
[OH|PO
 
4
]
 
2
19.12.15Frondelite
Mn
2+
 
Fe
3+
4
[(OH)
 
5
|(PO
 
4
)
 
3
]
19.12.16Rockbridgeite
Fe
2+
 
Fe
3+
4
[(OH)
 
5
|(PO
 
4
)
 
3
]
19.12.17Kryzhanovskite
MnFe
 
2
(PO
 
4
)
 
2
(OH)
 
2
·H
 
2
O
19.12.18Landesite
Mn
2+
3-x
Fe
3+
x
[(OH)
 
x
|(PO
 
4
)
 
2
] · (3-x)H
 
2
O
19.12.19Phosphoferrite
(Fe,Mn)
 
3
(PO
 
4
)
 
2
·3H
 
2
O
19.12.20Reddingite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
·3H
 
2
O
19.12.21Earlshannonite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
·4H
 
2
O
19.12.22Hureaulite
(Mn,Fe)
 
5
H
 
2
(PO
 
4
)
 
4
·4H
 
2
O
19.12.23Switzerite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
·7H
 
2
O
19.12.24Laueite
Mn
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.12.25Pseudolaueite
Mn
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.12.26Strunzite
Mn
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
 · 6H
 
2
O
19.12.27Stewartite
Mn
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
 · 8H
 
2
O
19.12.28Alluaudite
(Na,Ca)Mn
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(PO
 
4
)
 
3
19.12.29Ferroalluaudite
(Na,Ca)Fe
2+
 
(Fe
3+
 
,Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)
 
3
19.12.30Fillowite
{Mn
2+
 
}{Na
 
8
}{Ca
 
4
Na
 
4
}{(Mn
2+
 
,Fe
2+
 
)
 
43
}[PO
 
4
]
 
36
19.12.31Johnsomervilleite
{Ca}{Na
 
6
[ ]
 
2
}{Ca
 
6
Na
 
2
}{(Fe
2+
 
,Mg,Mn
2+
 
)
 
43
}[PO
 
4
]
 
36
19.12.32Wicksite
NaCa
 
2
(Fe
2+
 
,Mn
2+
 
)
 
4
MgFe
3+
 
[PO
 
4
]
 
6
 · 2H
 
2
O
19.12.33Dickinsonite-(KMnNa)
{KNa}{Mn
2+
 
[ ]}{Ca}{Na
 
3
}{Mn
2+
13
}{Al}[(OH)
 
2
|(PO
 
4
)
 
12
]
19.12.34Sarcopside
(Fe
2+
 
,Mn
2+
 
,Mg)
 
3
[PO
 
4
]
 
2
19.12.36Graftonite
(Fe
2+
 
,Mn
2+
 
,Ca)
 
3
[PO
 
4
]
 
2
19.12.37Wilhelmvierlingite
CaMnFe
3+
 
[OH|(PO
 
4
)
 
2
] · 2H
 
2
O
19.12.38Fairfieldite
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)[PO
 
4
]
 
2
 · 2H
 
2
O
19.12.39Beusite
(Mn
2+
 
,Fe
2+
 
,Ca,Mg)
 
3
[PO
 
4
]
 
2
19.12.40Messelite
Ca
 
2
(Fe
2+
 
,Mn
2+
 
)[PO
 
4
]
 
2
 · 2H
 
2
O
19.12.41Jahnsite-(CaMnFe)
CaMn
2+
 
Fe
2+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.42Jahnsite-(CaMnMn)
CaMn
2+
 
Mn
2+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.43Jahnsite-(CaMnMg)
CaMn
2+
 
(Mg,Fe
2+
 
)
 
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.44Keckite
(Ca,Mg)(Mn
2+
 
,Zn)
 
2
Fe
3+
3
(PO
 
4
)
 
4
(OH)
 
3
 · 2H
 
2
O
19.12.45Stanfieldite
Ca
 
7
Ca
 
2
Mg
 
9
[PO
 
4
]
 
12
19.12.46Laubmannite
(Fe
2+
 
,Mn
2+
 
,Ca)
 
3
Fe
3+
6
[(OH)
 
3
|PO
 
4
]
 
4
19.12.47Zodacite
Ca
 
4
Mn
2+
 
Fe
3+
4
[(OH)
 
2
|(PO
 
4
)
 
3
]
 
2
 · 12H
 
2
O
19.12.48Hagendorfite
NaCaMn
2+
 
Fe
2+
2
(PO
 
4
)
 
3
19.12.49Maghagendorfite
NaMn(Mg,Fe,Fe)
 
3
(PO
 
4
)
 
3
19.12.50Varulite
NaCaMn
2+
 
Mn
2+
2
(PO
 
4
)
 
3
19.12.51Griphite
Na
 
4
Li
 
2
Ca
 
6
(Mn
2+
 
,Fe
2+
 
,Mg)
 
19
Al
 
8
[(F,OH)|(PO
 
4
)
 
3
]
 
8
19.12.52Attakolite
(Ca,Sr)Mn(Al,Fe)
 
4
[(OH)
 
4
|(SiO
 
4
,PO
 
4
)|(HPO
 
4
,PO
 
4
)
 
3
]
19.12.53Arrojadite-(KFe)
{KNa}{Fe
2+
 
[ ]}{Ca}{Na
 
2
[ ]}{Fe
2+
13
}{Al}[(OH)
 
2
|HPO
 
4
|(PO
 
4
)
 
11
]
19.12.54Lun'okite
(Mn,Ca)(Mg,Fe,Mn)Al(PO
 
4
)
 
2
OH·4H
 
2
O
19.12.55Eosphorite
(Mn
2+
 
,Fe
2+
 
)Al[(OH)
 
2
|PO
 
4
] · H
 
2
O
19.12.56Ernstite
(Mn
2+
 
,Fe
3+
 
)Al[(OH,O)
 
2
|PO
 
4
] · H
 
2
O
19.12.57Childrenite
(Fe
2+
 
,Mn
2+
 
)Al[(OH)
 
2
|PO
 
4
] · H
 
2
O
19.12.58Bobfergusonite
Na
 
2
Mn
 
5
FeAl(PO
 
4
)
 
6
19.12.59Qingheiite
NaMn
3+
 
Mg(Al,Fe
3+
 
)[PO
 
4
]
 
3
19.12.60Whiteite-(CaFeMg)
Ca(Fe
2+
 
,Mn
2+
 
)Mg
 
2
Al
 
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.61Whiteite-(CaMnMg)
CaMn
2+
 
Mg
 
2
Al
 
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.62Whiteite-(MnFeMg)
(Mn
2+
 
,Ca)(Fe
2+
 
,Mn
2+
 
)Mg
 
2
Al
 
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.63Rittmannite
(Mn
2+
 
,Ca)Mn
2+
 
(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
19.12.64Zanazziite
Ca
 
2
(Mg,Fe)(Mg,Fe,Al)
 
4
Be
 
4
[(OH)
 
4
|(PO
 
4
)
 
6
] · 6H
 
2
O
19.12.65Samuelsonite
(Ca,Ba)Ca
 
8
Fe
2+
2
Mn
2+
2
Al
 
2
[(OH)
 
2
|(PO
 
4
)
 
10
]

Other Names for Ludlamite

German names:
Ludlamit
Russian names:
Лудламит
Spanish names:
Ludlamita

Other Information

Magnetism:Diamagnetic
Other Information:Soluble in acids.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ludlamite

Reference List:Maskelyne and Field (1877) Philosophical Magazine and Journal of Science: 3: 52, 135, 525.

Goldschmidt, V. (1918) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 5: 171.

Berman (1925) American Mineralogist: 10: 428.

Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 124.

Glass and Vhay (1949) American Mineralogist: 34: 335.

Wolfe (1949) American Mineralogist: 34: 94.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 952-953.

Abrahams, S.C. and J.L. Bernstein (1966) Crystal structure of paramagnetic ludlamite, Fe3(PO4)2 •4H2O, at 298°K. Journal of Chemical Physics, Lancaster, PA, 44(6), 2223–2229.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 322.

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    Localities for Ludlamite

    Hide Locality List
    The 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.
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    (TL) indicates type locality. ? 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.
    Austria
     
    • Carinthia
      • Koralpe Mts
        • Moschkogel Mt. - Weinebene area
          • Brandrücken
    		G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    Bolivia
     
    • Oruro Department
      • Dalence Province
        • Huanuni
    		[MinRec 32:472]
    • Potosí Department
      • Saavedra Province
        • Machacamarca District (Colavi District)
    		First found here in December 2003. -Alfredo Petrov
    Brazil
     
    • Southeast Region
      • Minas Gerais
        • Doce valley
          • Galiléia
            • Laranjeiras
    		No reference listed
    [MinRec 12:69]
    Canada
     
    • Yukon Territory
      • Dawson Mining District
    		[Mineralogical Record Vol 23 No.4 pp27]
    [Mineralogical Record Vol 23 No.4 pp27]
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
    		Povondra, P., Pivec, E. (eds.) et al.: Přibyslavice peraluminuous granite. Acta universitatis carolinae, Geologica, 1987, no. 3, s . 183 – 283.
      • Plzeň Region
        • Domažlice (Taus)
          • Otov
    		Masau, M., Staněk, J., Černý, P., Chapman, R. (2000). Metasomatic wolfeite and associated phosphates from the Otov I granitic pegmatite, western Bohemia. J. Czech Geol. Soc. 45, 159-173.
    France
     
    • Languedoc-Roussillon
      • Aude
        • Carcassonne
          • Mas-Cabardès
            • Salsigne
    		 Le Règne Minéral, Hors série (3), 36-54
    Germany
     
    • Bavaria
      • Lower Bavaria
        • Bavarian Forest
          • Zwiesel
            • Rabenstein
    		Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Waidhaus
              • Hagendorf
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 729; Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    http://www.berthold-weber.de/h_miner.htm
    Wittern: "Mineralfundorte in Deutschland", 2001
    Japan
     
    • Honshu Island
      • Kanto region
        • Tochigi Prefecture
          • Ashio
    		Ryoichi SADANAGA and Michiaki BUNNO (1974) THE WAKABAYASHI MINERAL COLLECTION Bulletin No. 7 The University Museum, The University of Tokyo
    Kosovo
     
    • Kosovska Mitrovica
      • Trepča valley
        • Trepča complex
    		Féraud J. (1979) - La mine " Stari-Trg " (Trepca, Yougoslavie) et ses richesses minéralogiques. Avec la collaboration de Mari D. et G. (1979) Minéraux et Fossiles, n° 59-60, p. 19-28
    Mexico
     
    • Chihuahua
      • Mun. de Aquiles Serdán
          • East Camp
    		MinRec 14:169; Panczner (1987): 77-395.
    Portugal
     
    • Guarda District
      • Sabugal
    		Schnorrer-Köhler (1991), Mineral Occurrences.
    South Africa
     
    • Gauteng Province
    		Minerals of South Africa
    Spain
     
    • Murcia
      • Sierra de Cartagena
        • La Unión
    UK
     
    • England
      • Cornwall
        • Camborne - Redruth - St Day District
          • Baldhu
    		Phil. Mag., 5th ser. (1877): 3, 52; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 953; Embrey & Symes (1987) "Minerals of Cornwall and Devon": 112.
    USA
     
    • Connecticut
      • Middlesex Co.
        • East Hampton
    		Seaman, 1976. Pegmatite Minerals of the World
    • Idaho
      • Lemhi Co.
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 953; Ream, Lanny R. (2004) Idaho Minerals, 2nd edition, Revised and Updated
    R&M 70:4 pp 242-263
    • Maine
      • Oxford Co.
        • Greenwood
    		No reference listed
        • Newry
    		No reference listed
    King, V. and Foord, E., 1994, Mineralogy of Maine, v. 1; King, V, 2006, Minerals of Halls Ridge and Plumbago-Puzzle Mountain, Newry, Oxford County, Maine, Mineral News, v. 22 (6), p. 1-3.
        • Paris
        • Stoneham
    		No reference listed
    • New Hampshire
      • Grafton Co.
        • Groton
    		Rocks & Minerals: 80: 252.
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 686, 953.
    Whitmore & Lawrence, 2004. The Pegmatite Mines Known As Palermo, p. 96.
      • Strafford Co.
        • Strafford
    		Rocks & Min. 80:256 (2005)
    • New Mexico
      • Grant Co.
        • Burro Mountains District
          • Tyrone Area
    Minerals of New Mexico 3rd ed.
    • South Dakota
      • Custer Co.
        • Custer District
          • Custer
    		Rocks & Min.:60:117.
          • Fourmile
    		Mineralogical Record: 17: 237-254; Rocks & Minerals: 60: 117.
      • Pennington Co.
        • Harney City
    		R&M 75:3 pp 156-169
        • Keystone District
          • Glendale
    		Rocks & Minerals: 60: 116.
    R&M 75:3 pp 156-169
          • Keystone
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    R&M 75:3 pp 156-169
    Rocks & Minerals: 57: 160; &/or 60:110 & 112.
    Mineral and/or Locality
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