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Monazite-(La)

Big Photo

Kuivchorr Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© Pavel M. Kartashov

Show Monazite-(La) Photos (2)
Formula:
(La,Ce,Nd)PO
 
4
Hardness:5 - 5½
Name:From the Greek μουάζειυ "to be solitary" in allusion to the rarity of its presence in the first known localities, plus "La" as the La-dominant member of the Monazite series.


Monazite Group

Classification of Monazite-(La)

IMA status:Approved
Strunz 8th edition ID:7/A.15-10
Nickel-Strunz 10th (pending) edition ID:8.AD.50

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
Dana 8th edition ID:38.4.3.2

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
Hey's CIM Ref.:19.9.4

19 : Phosphates
9 : Phosphates of rare earths and Sc
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Type Occurrence of Monazite-(La)

Type Locality:Kounrad Massif, Balqash (Balkhash; Karatas) Region, Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast'), Kazakhstan

Physical Properties of Monazite-(La)

Hardness (Mohs):5 - 5½

Optical Data of Monazite-(La)

Type:Biaxial (+)
RI values: nα = 1.770 - 1.800 nβ = 1.771 - 1.802 nγ = 1.830 - 1.850
2V:Measured: 12° , Calculated: 12° to 24°
Maximum Birefringence:δ = 0.060

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

Chemical Properties of Monazite-(La)

Formula:
(La,Ce,Nd)PO
 
4
Essential elements:La, O, P
All elements listed in formula:Ce, La, Nd, O, P

Relationship of Monazite-(La) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.AD.05Nahpoite
Na
 
2
HPO
 
4
8.AD.10Monetite
CaHPO
 
4
8.AD.10Weilite
CaHAsO
 
4
8.AD.10Švenekite
Ca(H
 
2
AsO
 
4
)
 
2
8.AD.15Archerite
(K,NH
 
4
)[H
 
2
PO
 
4
]
8.AD.15Biphosphammite
(NH
 
4
,K)H
 
2
PO
 
4
8.AD.20Phosphammite
(NH
 
4
)
 
2
HPO
 
4
8.AD.25Buchwaldite
NaCaPO
 
4
8.AD.30Schultenite
PbHAsO
 
4
8.AD.35Chernovite-(Y)
YAsO
 
4
8.AD.35Clinobisvanite
BiVO
 
4
8.AD.35Dreyerite
BiVO
 
4
8.AD.35Wakefieldite-(Ce)
(Ce,Pb)VO
 
4
8.AD.35Wakefieldite-(Y)
YVO
 
4
8.AD.35Xenotime-(Y)
YPO
 
4
8.AD.35Pretulite
ScPO
 
4
8.AD.35Xenotime-(Yb)
YbPO
 
4
8.AD.40Pucherite
BiVO
 
4
8.AD.45Ximengite
BiPO
 
4
8.AD.50Gasparite-(Ce)
(Ce,REE)AsO
 
4
8.AD.50Monazite-(Ce)
(Ce,La,Nd,Th)PO
 
4
8.AD.50Monazite-(Nd)
(Nd,La,Ce)PO
 
4
8.AD.50Rooseveltite
BiAsO
 
4
8.AD.50Cheralite
(Ca,Ce)(Th,Ce)[PO
 
4
]
 
2
8.AD.50Monazite-(Sm)
(Sm,Gd,Ce,Th)(PO
 
4
)
8.AD.55Tetrarooseveltite
Bi(AsO
 
4
)
8.AD.60Chursinite
(Hg-Hg)
 
0.5
Hg
2+
 
[AsO
 
4
]
Related Minerals - Hey's Index Grouping:

- +
19.9.1Xenotime-(Y)
YPO
 
4
19.9.2Churchite-(Y)
YPO
 
4
·2H
 
2
O
19.9.3Monazite-(Ce)
(Ce,La,Nd,Th)PO
 
4
19.9.5Monazite-(Nd)
(Nd,La,Ce)PO
 
4
19.9.6Rhabdophane-(Ce)
(Ce,La)PO
 
4
·H
 
2
O
19.9.7Rhabdophane-(La)
(La,Ce)PO
 
4
·H
 
2
O
19.9.8Rhabdophane-(Nd)
(Nd,Ce,La)PO
 
4
·H
 
2
O
19.9.9Vitusite-(Ce)
Na
 
3
(Ce,La,Nd)(PO
 
4
)
 
2
19.9.10Florencite-(Ce)
CeAl
 
3
[(OH)
 
6
|(PO
 
4
)
 
2
]
19.9.11Florencite-(La)
LaAl
 
3
[(OH)
 
6
|(PO
 
4
)
 
2
]
19.9.12Florencite-(Nd)
NdAl
 
3
[(OH)
 
6
|(PO
 
4
)
 
2
]
19.9.13Kolbeckite
ScPO
 
4
·2H
 
2
O

Other Names for Monazite-(La)

Other Languages:
Russian:Монацит-(La)

Other Information

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 Monazite-(La)

Reference List:American Mineralogist (1966): 51: 152.

Articles/Blogs about Monazite-(La)

Internet Links for Monazite-(La)

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    Localities for Monazite-(La)

    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.
    Australia
     
    • Western Australia
    		Trans. Inst. Mining Metall.(Sect. B:Applied Earth Sci.) 104, 203-208(1995)
    Bolivia
     
    • Potosí Department
      • Bustillos Province
        • Llallagua
    		No reference listed
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Liberec Region
    		Scharm, B.: Přehled minerálů nalezených v oblasti uranových koncentrací v severočeské křídě. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, s. 169-172.
    France
     
    • Brittany
      • Ille-et-Vilaine
        • Le Grand Fougeray
    		P. Devismes : "Atlas photographique des minéraux d'alluvions", BRGM, 1978.
    • Pays de Loire
      • Loire-Atlantique
        • Nozay
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		Kolitsch, U. & Götzinger, M. (2000): Einige Neufunde aus der Grube Clara im mittleren Schwarzwald: Eulytin, Namibit, Volborthit, Gearksutit, Spertiniit, Monazit-(La), Protasit, Sainfeldit, Cyanotrichit und Vauquelinit. Erzgräber 14, 33-47. (in German)
    • Rhineland-Palatinate
      • Eifel Mts
        • Laach lake volcanic complex
          • Kruft
    		DellaVentura, G., Bellatreccia, F., Williams, C.T., Zirkonolith with significant REEZrNb(Mn,Fe)O7 from a xenolith of the Laacher See eruptive center, Eifel volcanic region, Germany, Canadian Mineralogist 38, 57-65, 2000
          • Mendig
            • Niedermendig
    		DellaVentura, G., Bellatreccia, F., Williams, C.T., Zirkonolith with significant REEZrNb(Mn,Fe)O7 from a xenolith of the Laacher See eruptive center, Eifel volcanic region, Germany, Canadian Mineralogist 38, 57-65,2000
    [DellaVentura, G., Bellatreccia, F., Williams, C.T., Zirkonolith with significant REEZrNb(Mn,Fe)O7 from a xenolith of the Laacher See eruptive center, Eifel volcanic region, Germany, Canadian Mineralogist 38, 57-65, 2000] [Blass, G.; Schäfer, Ch.,Huttonit- und Xenotim-(Y) – Neufunde aus der Vulkaneifel, Mineralien-Welt 13/3, 32-35, 2002
              • Wingertsberg Mt.
    		DellaVentura, G., Bellatreccia, F., Williams, C.T., Zirkonolith with significant REEZrNb(Mn,Fe)O7 from a xenolith of the Laacher See eruptive center, Eifel volcanic region, Germany, Canadian Mineralogist 38, 57-65, 2000
    Kazakhstan
     
    • Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast')
      • Balqash (Balkhash; Karatas) Region
    Madagascar
     
    • Fianarantsoa Province
      • Amoron'i Mania Region
        • Ambositra Department
          • Manandriana Commune
    		Pavel M. Kartashov data
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Lovozero Massif
    		I.V. Pekov analytical data
            • Seidozero Lake
    South Africa
     
    • Northwest Province
      • Western Bushveld Complex
        • Rustenburg District
          • Pilansberg Complex
    		The Canadian Mineralogist, V 42, 2004, pp. 1169-1178.
    Tanzania
     
    • Kilimanjaro Region
      • Olmani Cinder Cone (Olmani Hill)
    		R.L. Rudnick et al. , Earth and Planetary Science Letters, 114, 1993, pp. 463-475.
    UK
     
    • England
      • Cornwall
        • Mount's Bay District
          • St Hilary
    		UKJMM 16
    USA
     
    • Nevada
      • Eureka Co.
        • Lynn District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • North Carolina
      • Yancey Co.
        • Spruce Pine District
          • Black Mtn-Bowlens Creek Area
            • Burnsville
              • Hurricane Mt.
    		C.W. Allen collection
    • Wisconsin
      • Marathon Co.
        • Wausau pluton
          • "Rotten granite" quarries
    		Thomas Buchholz, 1999 "Minerals of a Wausau Pegmatite, Marathon County, Wisconsin", Rocks and Minerals, vol .74 #4, p. 254 - 258.
    Mineral and/or Locality
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