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Brockite

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Anna Lee Lode Occurrence, Wet Mountains Area, Custer Co., Colorado, USA
© Jeffrey Shallit 2007

Formula:
(Ca,Th,Ce)(PO
 
4
)·H
 
2
O
System:HexagonalHardness:3 - 4
This page provides mineralogical data about Brockite.

Classification of Brockite

IMA status:Approved
Strunz 8th edition ID:7/C.29-40
Nickel-Strunz 10th (pending) edition ID:8.CJ.45

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
Dana 8th edition ID:40.4.7.5

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O
Hey's CIM Ref.:19.10.9

19 : Phosphates
10 : Phosphates of Pb, Th, V and Bi
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Type Occurrence of Brockite

Type Locality:Unnamed prospect, Bassick Mine area, Querida, Wet Mts, Custer Co., Colorado, USA
Year of Discovery:1962

Physical Properties of Brockite

Hardness (Mohs):3 - 4

Crystallography of Brockite

Crystal System:Hexagonal
Cell Parameters:a = 6.98Å, c = 6.4Å
Ratio:a:c = 1 : 0.917
Unit Cell Volume:V 270.04 ų (Calculated from Unit Cell)

Optical Data of Brockite

Type:Uniaxial (+)
RI values: nω = 1.680 nε = 1.695
Maximum Birefringence:δ = 0.015

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

Chemical Properties of Brockite

Formula:
(Ca,Th,Ce)(PO
 
4
)·H
 
2
O
Essential elements:Ca, H, O, P
All elements listed in formula:Ca, Ce, H, O, P, Th

Relationship of Brockite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CJ.05Stercorite
NaNH
 
4
HPO
 
4
·4H
 
2
O
8.CJ.10Mundrabillaite
(NH
 
4
)
 
2
Ca(HPO
 
4
)
 
2
·H
 
2
O
8.CJ.10Swaknoite
(NH
 
4
)
 
2
Ca[HPO
 
4
]
 
2
 · H
 
2
O
8.CJ.15Nabaphite
NaBaPO
 
4
·9H
 
2
O
8.CJ.15Nastrophite
Na(Sr,Ba)PO
 
4
·9H
 
2
O
8.CJ.20Haidingerite
Ca[HAsO
 
4
] · H
 
2
O
8.CJ.25Vladimirite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 5H
 
2
O
8.CJ.30Ferrarisite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 9H
 
2
O
8.CJ.35Machatschkiite
(Ca,Na)
 
6
AsO
 
4
(AsO
 
3
OH)
 
3
(PO
 
4
,SO
 
4
)·15H
 
2
O
8.CJ.40Phaunouxite
Ca
 
3
[AsO
 
4
]
 
2
 · 11H
 
2
O
8.CJ.40Rauenthalite
Ca
 
3
[AsO
 
4
]
 
2
 · 10H
 
2
O
8.CJ.45Grayite
(Th,Pb,Ca)PO
 
4
·H
 
2
O
8.CJ.45Rhabdophane-(Ce)
(Ce,La)PO
 
4
·H
 
2
O
8.CJ.45Rhabdophane-(La)
(La,Ce)PO
 
4
·H
 
2
O
8.CJ.45Rhabdophane-(Nd)
(Nd,Ce,La)PO
 
4
·H
 
2
O
8.CJ.45Tristramite
(Ca,U,Fe)(PO
 
4
,SO
 
4
)·2H
 
2
O
8.CJ.45Smirnovskite
(Th,Ca)PO
 
4
 ·nH
 
2
O
8.CJ.50Ardealite
Ca
 
2
[HPO
 
4
|SO
 
4
] · 4H
 
2
O
8.CJ.50Brushite
CaHPO
 
4
·2H
 
2
O
8.CJ.50Churchite-(Y)
YPO
 
4
·2H
 
2
O
8.CJ.50Pharmacolite
CaHAsO
 
4
·2H
 
2
O
8.CJ.50Churchite-(Nd)
NdPO
 
4
·2H
 
2
O
8.CJ.55Mcnearite
NaCa
 
5
[(HAsO
 
4
)
 
4
|AsO
 
4
] · 4H
 
2
O
8.CJ.60Dorfmanite
Na
 
2
(PO
 
3
OH)·2H
 
2
O
8.CJ.65Sincosite
CaV
 
2
(PO
 
4
)
 
2
O
 
2
·5H
 
2
O
8.CJ.65Bariosincosite
Ba(V
4+
 
O)
 
2
(PO
 
4
)
 
2
·4H
 
2
O
8.CJ.70Catalanoite
Na
 
2
[HPO
 
4
] · 8H
 
2
O
8.CJ.75Guérinite
Ca
 
5
[(HAsO
 
4
)
 
2
|(AsO
 
4
)
 
2
] · 9H
 
2
O
8.CJ.80Ningyoite
CaU(PO
 
4
)
 
2
·1-2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
19.10.1 Oxypyromorphite
Pb
 
10
(PO
 
4
)
 
6
O
19.10.2Plumbogummite
PbAl
 
3
[(OH)
 
5
|(PO
 
4
)
 
2
] · H
 
2
O
19.10.3Kamitugaite
AlPb(UO
 
2
)
 
5
[(OH)
 
9
|(PO
 
4
,AsO
 
4
)
 
2
] · 5H
 
2
O
19.10.5Drugmanite
Pb(Fe
3+
 
,Al)
 
2
[OH|PO
 
4
]
 
2
19.10.6Brabantite
CaTh(PO
 
4
)
 
2
19.10.8Grayite
(Th,Pb,Ca)PO
 
4
·H
 
2
O
19.10.10Sincosite
CaV
 
2
(PO
 
4
)
 
2
O
 
2
·5H
 
2
O
19.10.11Ximengite
BiPO
 
4
19.10.12Paulkellerite
(BiO)
 
2
Fe
3+
 
[(OH)
 
2
|PO
 
4
]

Other Names for Brockite

Other Languages:
German:Brockit
Russian:Броккит
Spanish:Brockita

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 Brockite

Reference List:American Mineralogist: 47: 1346-1355.

Articles/Blogs about Brockite

Internet Links for Brockite

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  • Raman and XRD data at RRUFF project
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  • Brockite details from Handbook of Mineralogy (PDF)
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    Localities for Brockite

    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.
    Canada
     
    • Québec
      • Rouville Co.
        • Mont Saint-Hilaire
    		[MinRec 2:269-270, 2:142, 21:299-300]
    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.
      • Ústí Region
        • Ceská Lípa (Böhmisch Leipa)
    		Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Třebíč
    		Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Fukushima Prefecture
    		Shoji & Akai (1994) Science Reports of Niigata University, Series E, 9, 89-96.
    Kazakhstan
     
    • Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast')
      • Mointy (Moyynty)
        • Mointy Railway Station
    Poland
     
    • Lower Silesia (Dolnośląskie)
    		Kucha H., Wieczorek A. 1980: Ca1-xTh1-xRE2x[PO4]2 . 2H2O, a new mineral from Lower Silesia, Poland. Mineralogia Polonica, vol. 11, No 1, 123-136
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
    		P.M. Kartashov data
    USA
     
    • Arizona
      • Mohave Co.
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 147; Staatz, M.H. (1985), Geology and description of the thorium and rare-earth veins in the Laughlin Peak area, Colfax Co., NM, USGS PP 1049-E.
    • Colorado
      • Custer Co.
        • Rosita District
    		Dana's New Mineralogy
        • Wet Mts
    		Dana's New Mineralogy
    Dana's New Mineralogy
          • Querida
            • Bassick Mine area
    		Fisher, F.G. & R. Meyrowitz (1962), Brockite, a new calcium thorium phosphate from the Wet Mountains, Colorado, Am.Min: 47: 1346-1355.
      • Fremont Co.
        • Iron Mountain complex
    		Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
      • Gunnison Co.
        • Quartz Creek District
    		Minerals of Colorado (1997) Eckels, E. B.
    • Idaho
      • Lemhi Co.
    		USGS PP1049-A(Staatz,1979)
    • Montana
      • Beaverhead Co.
        • Lemhi Pass District
    		U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • New Mexico
      • Colfax Co.
    		Northrup, Minerals of New Mexico, 3rd Rev. Ed., 1996
    • Utah
      • Sevier Co.
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Virginia
      • Amelia Co.
        • Winterham
    		[Virginia Minerals, Vol 46:2]
    Mineral and/or Locality
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