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Monazite Supergroup

A group of related mineral species
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About Monazite SupergroupHide

Formula:
MTO4, where M = LREE, Th, Ca, Bi, Pb; T = P, As, Si, Cr6+
A group of monoclinic primarily phosphates and arsenates of the LREE.

For references, see the page on monazite.


Unique IdentifiersHide

Mindat ID:
29313
Long-form identifier:
mindat:1:1:29313:8

IMA Classification of Monazite SupergroupHide

IMA status notes:
IMA Approved Group Name

Chemistry of Monazite SupergroupHide

Mindat Formula:
MTO4, where M = LREE, Th, Ca, Bi, Pb; T = P, As, Si, Cr6+

Age distributionHide

Recorded ages:
Paleoarchean to Neogene : 3254 ± 72 Ma to 5.4 ± 0.5 Ma - based on 271 recorded ages.
Sample ages:
Sample IDRecorded ageGeologic TimeDating method
15.4 ± 0.5 MaMiocene208Pb/232U
212.1 ± 3.6 MaMiocene207Pb/235U
3285 MaCisuralianU-Th-Pb
4300 MaPennsylvanianU-Th-Pb
5303 MaPennsylvanianU-Th-Pb
6309 MaPennsylvanianU-Th-Pb
7317 MaPennsylvanianU-Th-Pb
8324 ± 4 MaMississippianU-Pb
9839 ± 21 MaTonianPb/Pb
10968.5 ± 12.4 MaTonian206Pb/238U
11986 ± 8 MaTonian207Pb/206Pb
12996.2 ± 14.7 MaTonian206Pb/238U
131013 ± 13 MaStenian207Pb/206Pb
141025 ± 7 MaStenian207Pb/206Pb
151038 ± 11 MaStenian207Pb/206Pb
161051 ± 11 MaStenian207Pb/206Pb
171156.8 ± 17.6 MaStenian206Pb/238U
182624 ± 9 MaNeoarcheanPb/Pb
192651 ± 3 MaNeoarcheanPb/Pb
203254 ± 72 MaPaleoarcheanPb/Pb
Sample references:
IDTypeLocalityReferenceNotes
1Jas Roux, La Chapelle-en-Valgaudemar, Gap, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France
2  "  "
3Seiffen, Erzgebirgskreis, Saxony, Germany
4  "  "
5  "  "
6  "  "
7  "  "
8Niederbobritzsch, Bobritzsch-Hilbersdorf, Mittelsachsen, Saxony, Germany
90611E.1-2Jack Hills, Nookawarra Station, Murchison Shire, Western Australia, Australia
10Andover Iron Mine, Andover Township, Sussex County, New Jersey, USA
11  "  "
12Noble pit, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA
13  "  "
14  "  "
15  "  "
16  "  "
17  "  "
180611A.1-2xJack Hills, Nookawarra Station, Murchison Shire, Western Australia, Australia
190582D.2-1  "  "
200611B.1-2  "  "

Chemical AnalysisHide

Oxide wt%:
 1
SO30.04 %
P2O53.61 %
V2O511.35 %
As2O521.39 %
SiO20.23 %
ThO22.49 %
La2O328.42 %
Ce2O31.79 %
Pr2O37.64 %
Nd2O318.69 %
Sm2O30.56 %
Gd2O30.03 %
(HREE2O3) (predicted)0.07 %
Fe2O3*0.11 %
CaO0.29 %
SrO0.44 %
PbO0.01 %
Total:97.16 %
Empirical formulas:
Sample IDEmpirical Formula
2(La0.59Ce0.37Nd0.02Ca0.02Th0.01)1.01[(As0.81P0.16Si0.02S0.02)1.01O4]
3(La0.65Ce0.17Nd0.07Ca0.06Mn0.05Pr0.02)1.02[(As0.70V0.28P0.02)1.00O4]
1(La0.48Nd0.30Pr0.13Ce0.03Th0.03Ca0.01Sm0.01Sr0.01)[As0.51V0.34P0.14Si0.01O4]
4(Gd0.30Sm0.24Nd0.15Ce0.10La0.05Dy0.03Y0.03Tb0.02Eu0.02Pr0.02Ca0.01)0.98P1.01O4
Sample references:

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0020242CrocoiteBandiello E, Errandonea D, Martinez-Garcia D, Santamaria-Perez D, Manjon F J (2012) Effects of high-pressure on the structural, vibrational, and electronic properties of monzanite-type PbCrO4 Physical Review B85 024108-102012Red Lead mine, Dundas, Tasmania, Australia0293
0007026Gasparite-(Ce)Kolitsch U, Holtstam D, Gatedal K (2004) Crystal chemistry of REEXO4 compounds (X = P, As, V). I. Paragenesis and crystal structure of phosphatian gasparite-(Ce) from the Kesebol Mn-Fe-Cu deposit, Vastra Gotaland, Sweden European Journal of Mineralogy 16 111-1162004Kesebol Mn-Fe-Cu deposit, Vastra Gotaland, Sweden0293
0010388Gasparite-(Ce)Brahim A, Mongi F M, Amor H (2002) Cerium arsenate, CeAsO4 Acta Crystallographica E58 i98-i992002synthetic0293
0019487CrocoiteEffenberger H, Pertlik F (1986) Four monazite type structures: comparison of SrCrO4, SrSeO4, PbCrO4 (crocoite), and PbSeO4 Zeitschrift fur Kristallographie 176 75-831986Dundas, Tasmania0293
0009764RooseveltiteBedlivy D, Mereiter K (1982) Structure of alpha-BiAsO4 (rooseveltite) Acta Crystallographica B38 1559-15611982synthetic0293
0009634HuttoniteTaylor M, Ewing R C (1978) The crystal structure of the ThSiO4 polymorphs: huttonite and thorite Acta Crystallographica B34 1074-10791978synthetic0293
0019170Monazite-(Ce)Mooney R C L (1948) Crystal structures of a series of rare earth phosphates Journal of Chemical Physics 16 1003-10031948synthetic0293
0014540CrocoiteKnight K S (2000) A high temperature structural phase transition in crocoite (PbCrO4) at 1068 K: crystal structure refinement at 1073 K and thermal expansion tensor determination at 1000 K Mineralogical Magazine 64 291-3002000Dundas, Tasmania01073
0001703Monazite-(Sm)Ni Y, Hughes J M, Mariano A N (1995) Crystal chemistry of the monazite and xenotime structures Sm(PO4) American Mineralogist 80 21-2619950293
0001702Monazite-(Nd)Ni Y, Hughes J M, Mariano A N (1995) Crystal chemistry of the monazite and xenotime structures Nd(PO4) American Mineralogist 80 21-2619950293
0001699Monazite-(La)Ni Y, Hughes J M, Mariano A N (1995) Crystal chemistry of the monazite and xenotime structures La(PO4) American Mineralogist 80 21-2619950293
0001700Monazite-(Ce)Ni Y, Hughes J M, Mariano A N (1995) Crystal chemistry of the monazite and xenotime structures Ce(PO4) American Mineralogist 80 21-2619950293
0001698Monazite-(Ce)Ni Y, Hughes J M, Mariano A N (1995) Crystal chemistry of the monazite and xenotime structures American Mineralogist 80 21-2619950293
0000152CheraliteFinney J J, Rao N N (1967) The crystal structure of cheralite American Mineralogist 52 13-1919670293
0009297CrocoiteQuareni S, De Pieri R (1965) A three-dimensional refinement of the structure of crocoite, PbCrO4 Acta Crystallographica 19 287-28919650293
CIF Raw Data - click here to close

Relationship of Monazite Supergroup to other SpeciesHide

Monazite Supergroup Members:
Gasparite Group REE(AsO4)
  Gasparite-(Ce) Ce(AsO4)Mon. 2/m
  Gasparite-(La) La(AsO4)Mon. 2/m
  'Unnamed (Nd-dominant Gasparite)' Nd(AsO4)Mon. 2/m
Monazite Group REE(PO4)
  Monazite-(Ce) Ce(PO4)Mon. 2/m
  Monazite-(Gd) Gd(PO4)Mon.
  Monazite-(La) La(PO4)Mon. 2/m
  Monazite-(Nd) Nd(PO4)Mon. 2/m
  Monazite-(Sm) Sm(PO4)Mon. 2/m
Cheralite CaTh(PO4)2Mon. 2/m
Crocoite PbCr6+O4Mon. 2/m
Huttonite ThSiO4Mon. 2/m
Rooseveltite Bi(AsO4)Mon. 2/m
Click on any node to view relationships. Formula-derived relationship network for the group members above. Use Find related species to add formula-neighbour species outside the current group view. Solid links show inferred chemical differences; dashed violet links show same-formula crystallographic differences. Hydration states are not treated as relationship changes. These relationships do not imply any real-world substitution reactions between these species.

RadioactivityHide

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 Monazite SupergroupHide

References for Monazite SupergroupHide

Localities for Monazite SupergroupHide

Showing 5,360 localities.

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.
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