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Desautelsite

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Artinite Pit, Clear Creek area, New Idria District, San Benito Co., California, USA
© 2004 ROM

Show Desautelsite Photos (10)
Formula:
Mg
 
6
Mn
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
System:TrigonalHardness:2


Hydrotalcite Group.
Mn3+-analogue of pyroaurite.

Classification of Desautelsite

IMA status:Approved 1978
Strunz 8th edition ID:5/E.03-40
Nickel-Strunz 10th (pending) edition ID:5.DA.50

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
Dana 8th edition ID:16b.6.2.4

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
6 : AmBn(XO3)pZqxH2O & with (m+n):p = 8:1
Hey's CIM Ref.:11.12.3

11 : Carbonates
12 : Carbonates of Mn
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Type Occurrence of Desautelsite

Type Locality:Cedar Hill Quarry, Fulton Township, Lancaster Co., Pennsylvania, USA
Year of Discovery:1979

Physical Properties of Desautelsite

Hardness (Mohs):2

Crystallography of Desautelsite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Cell Parameters:a = 3.114(1) Å, c = 23.39(2) Å
Ratio:a:c = 1 : 7.511
Unit Cell Volume:V 196.43 ų (Calculated from Unit Cell)
Twinning:By rotation about [0001], common.
Comment:SG R-3m or R3m; Z = 3/8
X-Ray Powder Diffraction:
d-spacingIntensity
7.76 (100)
3.88 (60)
2.622 (50)
2.332 (60)
1.981 (60)
1.768 (20)
Comments:Powder pattern indistinguishable from that of pyroaurite (Fe2+-analogue).

Optical Data of Desautelsite

Type:Uniaxial (-)
RI values: nω = 1.569 nε = 1.547
Maximum Birefringence:δ = 0.022

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

Chemical Properties of Desautelsite

Formula:
Mg
 
6
Mn
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
Essential elements:C, H, Mg, Mn, O
All elements listed in formula:C, H, Mg, Mn, O

Relationship of Desautelsite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.DA.05Dypingite
Mg
 
5
[OH|(CO
 
3
)
 
2
]
 
2
 · 5H
 
2
O
5.DA.05Giorgiosite
Mg
 
5
[(CO
 
3
)
 
4
(OH)
 
2
] · 4H
 
2
O
5.DA.05Hydromagnesite
Mg
 
5
[(CO
 
3
)
 
4
(OH)
 
2
] · 4H
 
2
O
5.DA.05Widgiemoolthalite
Ni
 
5
[(CO
 
3
)
 
4
(OH)
 
2
] · 5H
 
2
O
5.DA.05UM1986-10
Mg
 
5
(Zn,Mn)
 
3
(CO
 
3
)
 
2
(OH,Cl)
 
12
·H
 
2
O
5.DA.05UM1987-01
Mg
 
4
(CO
 
3
)
 
2
(OH)
 
2
·6H
 
2
O ?
5.DA.10Artinite
Mg
 
2
[(OH)
 
2
|CO
 
3
] · 3H
 
2
O
5.DA.10Indigirite
Mg
 
2
Al
 
2
[(CO
 
3
)
 
4
(OH)
 
2
] · 15H
 
2
O
5.DA.10Chlorartinite
[Mg
 
2
(CO
 
3
)(H
 
2
O)(OH)]Cl · H
 
2
O
5.DA.15Otwayite
Ni
 
2
CO
 
3
(OH)
 
2
·H
 
2
O
5.DA.15Zaratite
Ni
 
3
(CO
 
3
)(OH)
 
4
·4H
 
2
O
5.DA.20Kambaldaite
NaNi
 
4
(CO
 
3
)
 
3
(OH)
 
3
·3H
 
2
O
5.DA.25Callaghanite
Cu
 
2
Mg
 
2
[(OH)
 
6
|CO
 
3
] · 2H
 
2
O
5.DA.30Claraite
(Cu,Zn)
 
3
[(OH)
 
4
|CO
 
3
] · 4H
 
2
O
5.DA.35Hydroscarbroite
Al
 
14
(CO
 
3
)
 
3
(OH)
 
36
·nH
 
2
O
5.DA.35Scarbroite
Al
 
5
(OH)
 
13
CO
 
3
·5H
 
2
O
5.DA.40Caresite
Fe
2+
4
Al
 
2
[(OH)
 
12
|CO
 
3
] · 3H
 
2
O
5.DA.40Quintinite
Mg
 
4
Al
 
2
(OH)
 
12
CO
 
3
H
 
2
O
5.DA.40Charmarite
Mn
2+
4
Al
 
2
[(OH)
 
12
|CO
 
3
] · 3H
 
2
O
5.DA.45Barbertonite
Mg
 
6
(Cr,Al)
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.45Brugnatellite
Mg
 
6
Fe
3+
 
[(OH)
 
13
|CO
 
3
] · 4H
 
2
O
5.DA.45Chlormagaluminite
(Mg,Fe
2+
 
)
 
4
Al
 
2
[(OH)
 
12
|(Cl
 
2
,CO
 
3
)] · 2H
 
2
O
5.DA.45Manasseite
Mg
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.45Sjögrenite
Mg
 
6
Fe
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.45Zaccagnaite
Zn
 
4
Al
 
2
(CO
 
3
)(OH)
 
12
·3H
 
2
O
5.DA.50Comblainite
(Ni
 
x
,Co
 
1-x
)(OH)
 
2
(CO
 
3
)
 
(1-x)/2
·nH
 
2
O
5.DA.50Hydrotalcite
Mg
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50Pyroaurite
Mg
 
6
Fe
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50Reevesite
Ni
 
6
Fe
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50Stichtite
Mg
 
6
Cr
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50Takovite
Ni
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.55Coalingite
Mg
 
10
Fe
3+
2
[(OH)
 
24
|CO
 
3
] · 2H
 
2
O
5.DA.60Karchevskyite
Related Minerals - Hey's Index Grouping:

- +
11.12.1Rhodochrosite
MnCO
 
3
11.12.2Holdawayite
Mn
 
6
(CO
 
3
)
 
2
(OH)
 
7
(Cl,OH)
11.12.4Kutnohorite
Ca(Mn,Mg,Fe)(CO
 
3
)
 
2

Other Names for Desautelsite

Synonyms:
IMA1978-016
Other Languages:
German:Desautelsit
Spanish:Desautelsita

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 Desautelsite

Reference List:Dunn, P.J., D.R. Peacor & T.D. Palmer (1979), Desautelsite, a new mineral of the pyroaurite group: American Mineralogist: 64: 127-130.

Articles/Blogs about Desautelsite

Internet Links for Desautelsite

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    Localities for Desautelsite

    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.
    Japan
     
    • Shikoku Island
      • Kochi Prefecture
        • Kochi City
    		Matsubara, S. et al (1984) Bulletin of the National Science Museum, 10, 81-86.
    USA
     
    • California
      • San Benito Co.
        • New Idria District
          • Clear Creek area
    		www.benitoitemine.com
    • Maryland
      • Montgomery Co.
        • Rockville
    		Min Rec 36:4 pp 435-446
    • Pennsylvania
      • Lancaster Co.
        • Fulton Township
    		AM 64 (1979), 127; HB3 (1997)
    Mineral and/or Locality
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