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Macquartite

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

Show Macquartite Photos (13)
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), 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
O
 
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,K)
 
98
Ca
 
20
(Si
 
84
Al
 
84
O
 
336
)(SO
 
4
)
 
26
Cl
 
2
·8H
 
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
 
1.5
S
 
1.5
)O
 
12
(Cl,OH)
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
2+
6
(W
6+
 
,Mg)
 
2
[(O,OH)
 
3
|SiO
 
4
]
 
2

Other Names for Macquartite

Synonyms:
IMA1979-037
Other Languages:
German:Macquartit
Spanish: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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    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.
    (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.
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 23rd Oct 2009 09:59:26