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Macquartite

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Mammoth-Saint Anthony Mine (Mammoth-St Anthony Mine; Mammoth Mine; St. Anthony Mine; Tiger property; Mammoth Gold Mines Ltd. property), St. Anthony deposit, Tiger, Mammoth District, Pinal Co., Arizona, USA
© 2003 ROM

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Formula:
Pb
 
3
Cu(CrO
 
4
)(SiO
 
3
)(OH)
 
4
·2H
 
2
O
System:MonoclinicColour:Orange cadmium
Hardness:3½
Name:For Louis Charles Henri Macquart (1745-1803), French chemist, who supplied crocoite from which chromium was discovered.
This page provides mineralogical data about Macquartite.

Classification of Macquartite

IMA status:Approved 1979
Strunz 8th edition ID:8/B.28-30
Nickel-Strunz 10th (pending) edition ID:9.HH.05

9 : SILICATES (Germanates)
H : Unclassified silicates
H : With Pb
Dana 7th edition ID:36.1.2.1
Dana 8th edition ID:36.1.2.1

36 : COMPOUND CHROMATES
1 : Miscellaneous
Hey's CIM Ref.:17.10.29

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate
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Type Occurrence of Macquartite

Type Locality:Mammoth-Saint Anthony Mine (Mammoth-St Anthony Mine; Mammoth Mine; St. Anthony Mine; Tiger property; Mammoth Gold Mines Ltd. property), St. Anthony deposit, Tiger, Mammoth District, Pinal Co., Arizona, USA
Place of Conservation of Type Material:British Museum, University of Arizona Geological Museum.
Year of Discovery:1980
Associated Minerals at type locality:
Dioptase

Physical Properties of Macquartite

Colour:Orange cadmium
Streak:pale orange
Hardness (Mohs):3½
Cleavage:Distinct/Good
Good on {100}
Density (measured):5.49 g/cm3
Density (calculated):5.58 g/cm3

Crystallography of Macquartite

Crystal System:Monoclinic
Cell Parameters:a = 20.81Å, b = 5.84Å, c = 9.26Å
β = 91.8°
Ratio:a:b:c = 3.563 : 1 : 1.586
Unit Cell Volume:V 1,124.82 ų (Calculated from Unit Cell)
Z:4
Morphology:Euhedral crystals in quartz
Comment:Probably C2/m

Optical Data of Macquartite

Type:Biaxial (-)
RI values: nα = 2.280 nβ = 2.310 nγ = 2.340
2V:Measured: 85° , Calculated: 88°
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:r > v strong

Chemical Properties of Macquartite

Formula:
Pb
 
3
Cu(CrO
 
4
)(SiO
 
3
)(OH)
 
4
·2H
 
2
O
Essential elements:Cr, Cu, H, O, Pb, Si
All elements listed in formula:Cr, Cu, H, O, Pb, Si

Relationship of Macquartite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.HH.10Luddenite
Cu
 
2
Pb
 
2
Si
 
5
O
 
14
·4H
 
2
O
9.HH.15Creaseyite
Cu
 
2
Pb
 
2
(Fe,Al)
 
2
Si
 
5
O
 
17
·6H
 
2
O
9.HH.20Plumbotsumite
Pb
 
5
Si
 
4
O
 
8
(OH)
 
10
9.HH.25Molybdophyllite
Pb
 
2
Mg
 
2
[(OH)
 
2
|Si
 
2
O
 
7
]
Related Minerals - Hey's Index Grouping:
17.10.1Nosean
Na
 
8
[SO
 
4
|Al
 
6
Si
 
6
O
 
24
]
17.10.2Pitiglianoite
Na
 
6
K
 
2
[SO
 
4
|Al
 
6
Si
 
6
O
 
24
] · 2H
 
2
O
17.10.3Vishnevite
(Na,K)
 
8
[(SO
 
4
,CO
 
3
)|Al
 
6
Si
 
6
O
 
24
] · 2H
 
2
O
17.10.4Haüyne
(Na,Ca)
 
4-8
[Al
 
6
Si
 
6
(O,S)
 
24
](SO
 
4
,Cl)
 
1-2
17.10.5Liottite
(Na,K)
 
16
Ca
 
8
[Cl
 
4
|(SO
 
4
)
 
5
|(Al
 
6
Si
 
6
O
 
24
)
 
3
]
17.10.6Latiumite
K
 
2
Ca
 
6
(Si,Al)
 
11
O
 
25
(SO
 
4
,CO
 
3
)
17.10.7Tuscanite
(K(Ca,Na)
 
6
(Si,Al)
 
10
O
 
22
[SO
 
4
,CO
 
3
,(OH)
 
2
]·H
 
2
O
17.10.8Microsommite
Na
 
4
K
 
2
Ca
 
2
[Cl
 
2
|SO
 
4
|Al
 
6
Si
 
6
O
 
24
]
17.10.9Delhayelite
(Na,K)
 
10
Ca
 
5
Al
 
6
Si
 
32
O
 
80
(Cl
 
2
,F
 
2
,SO
 
4
)
 
3
·18H
 
2
O
17.10.10Hydrodelhayelite
KCa
 
2
AlSi
 
7
O
 
17
(OH)
 
2
·6H
 
2
O
17.10.11Davyne
(Na,K)
 
6
Ca
 
2
[(Cl
 
2
,SO
 
4
)
 
2
|Al
 
6
Si
 
6
SO
 
24
]
17.10.12Afghanite
(Na,Ca,K)
 
8
[(Cl
 
2
,SO
 
4
,CO
 
3
)
 
3
|Al
 
6
Si
 
6
O
 
24
] · 0.5H
 
2
O
17.10.13Franzinite
(Na,K)
 
6
Ca
 
2
[(SO
 
4
)
 
2
|Al
 
6
Si
 
6
O
 
24
] · 0.5H
 
2
O
17.10.14Giuseppettite
(Na,K,Ca)
 
7-8
[(SO
 
4
,Cl)
 
1-2
|Al
 
6
Si
 
6
O
 
24
]
17.10.15Sacrofanite
(Na,Ca,K)
 
9
[{(OH)
 
2
,SO
 
4
,CO
 
3
,Cl
 
2
}
 
3
|Al
 
6
Si
 
6
O
 
24
] · 0.5H
 
2
O
17.10.16Chessexite
(Na,K)
 
4
Ca
 
2
(Mg,Zn)
 
3
Al
 
8
[(SO
 
4
)
 
10
|(SiO
 
4
)
 
2
] · 40H
 
2
O
17.10.17Innelite
Na
 
2
(Ba,K)
 
4
(Mg,Ca,Fe)Ti
 
3
Si
 
4
O
 
18
(OH,F)
 
1.5
SO
 
4
17.10.18Thaumasite
Ca
 
3
[CO
 
3
|SO
 
4
|Si(OH)
 
6
] · 12H
 
2
O
17.10.19Ellestadite
17.10.20Ellestadite-(Cl)
Ca
 
10
[Cl
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
17.10.21Ellestadite-(OH)
Ca
 
10
[(OH,Cl,F)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
17.10.22Ellestadite-(F)
Ca
 
10
[(F,Cl,OH)
 
2
|(SO
 
4
)
 
3
|(SiO
 
4
)
 
3
]
17.10.23Mattheddleite
Pb
 
5
(Si
 
1.2
S
 
1.8
)O
 
12
(Cl
 
0.6
OH
 
0.4
)
17.10.24Queitite
Pb
 
4
Zn
 
2
[SO
 
4
|SiO
 
4
|Si
 
2
O
 
7
]
17.10.25Roeblingite
Pb
 
2
Ca
 
6
Mn
2+
 
[OH|SO
 
4
|Si
 
3
O
 
9
]
 
2
 · 4H
 
2
O
17.10.26Yoshimuraite
Ba
 
2
Mn
 
2
TiOSi
 
2
O
 
7
(PO
 
4
)(OH)
17.10.27Kegelite
Pb
 
12
(Zn,Fe)
 
2
Al
 
4
(SO
 
4
)
 
4
Si
 
11
O
 
38
 or near
17.10.28Wenkite
(Ba,K)
 
4
(Ca,Na)
 
6
[(SO
 
4
)
 
3
|(Si,Al)
 
20
O
 
39
(OH)
 
2
] · 0.5H
 
2
O
17.10.30Welinite
Mn
3+
6
(W
6+
 
,Mg)
 
0.7
[(O,OH)
 
3
|SiO
 
4
]

Other Names for Macquartite

Synonyms:
IMA1979-037
German names:
Macquartit
Spanish names:
Macquartita

Other Information

Other Information:Decomposed by concentrated HCl.
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 Macquartite

Reference List:Williams, S.A. & M. Duggan (1980), La macquartite: Un nouveau silico-chromate de Tiger, AZ, Bulletin de Mineralogie: 103: 530-532.

American Mineralogist (1981): 66: 638.

American Mineralogist (1995): 80: 408.

Internet Links for Macquartite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Macquartite in the Natural History Museum (London) online catalogue
  • Macquartite details from Handbook of Mineralogy (PDF)
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    Localities for Macquartite

    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.
    USA
     
    • Arizona
      • Pinal Co.
        • Mammoth District
          • Tiger
            • St. Anthony deposit
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 282; Williams, S.A. & M. Duggan (1980), La macquartite: Un nouveau silico-chromate de Tiger, AZ, Bull. Mineral.: 103: 530-532.
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