Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Graeserite

Big Photo

Passaic Pit (Marshall Mine; Passaic Mine), Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA
© SHMM

Show Graeserite Photos (3)
Formula:
(Fe
3+
 
,Ti)
 
4
Ti
 
3
AsO
 
13
(OH)
System:MonoclinicColour:Black
Lustre:MetallicHardness:5½
Name:For Prof. Dr. Stefan Graeser (1935-), in recognition of his extensive research on the oxides and sulfosalts of arsenic in the Binntal region of Switzerland.


The Fe3+ dominant analog of Tomichite and the As3+ dominant analog of Derbylite.

Classification of Graeserite

IMA status:Approved
Strunz 8th edition ID:4/C.23-15
Nickel-Strunz 10th (pending) edition ID:4.JB.55

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
mindat.org URL:http://www.mindat.org/min-6977.html
Please feel free to link to this page.

Type Occurrence of Graeserite

Type Locality:Gorb, Lercheltini (Lärcheltini) area, Binn Valley, Wallis (Valais), Switzerland
Geological Setting of type material:In hydrothermal veins in a two-mica paragneiss.

Occurrences of Graeserite

Geological Setting:Metamorphosed Precambrian calc-silicate gneissic rock in the footwall of a Zn-Fe-Mn orebody (Sterling Hill, NJ).

Physical Properties of Graeserite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Black
Streak:Black
Hardness (Mohs):5½
Fracture:Conchoidal

Crystallography of Graeserite

Crystal System:Monoclinic

Chemical Properties of Graeserite

Formula:
(Fe
3+
 
,Ti)
 
4
Ti
 
3
AsO
 
13
(OH)
Essential elements:As, Fe, H, O, Ti
All elements listed in formula:As, Fe, H, O, Ti

Relationship of Graeserite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JB.05Fetiasite
(Fe
3+
 
,Fe
2+
 
,Ti)
 
3
[O
 
2
|As
 
2
O
 
5
]
4.JB.10Manganarsite
Mn
 
3
[(OH)
 
4
|As
 
2
O
 
4
]
4.JB.15Magnussonite
Mn
 
10
As
 
6
O
 
18
(OH,Cl)
 
2
4.JB.15UM1984-09-AsO:ClHMn
Mn
 
10
As
 
6
O
 
18
(OH)Cl
4.JB.20Armangite
Mn
2+
26
[CO
 
3
|(HAsO
 
3
)
 
4
|(AsO
 
3
)
 
14
]
4.JB.25Nanlingite
NaCa
 
6
(Mg,Fe,Li)
 
12
(AsO
 
3
)
 
2
[Fe(AsO
 
3
)
 
6
]F
 
14
·
4.JB.30Asbecasite
Ca
 
3
(Ti,Sn
4+
 
)Be
 
2
[(AsO
 
3
)
 
3
|SiO
 
4
]
 
2
4.JB.35Stenhuggarite
CaFeSbO(AsO
 
3
)
 
2
4.JB.40Trigonite
Pb
 
3
Mn
2+
 
[HAsO
 
3
|(AsO
 
3
)
 
2
]
4.JB.45Finnemanite
Pb
 
5
[Cl|(AsO
 
3
)
 
3
]
4.JB.50Gebhardite
Pb
 
8
[O|Cl
 
6
|(As
 
2
O
 
5
)
 
2
]
4.JB.55Derbylite
(Fe,Fe,Ti)
 
7
SbO
 
13
(OH)
4.JB.55Tomichite
(V,Fe)
 
4
Ti
 
3
AsO
 
13
OH
4.JB.60Hemloite
(As,Sb)
 
2
(Ti,V,Fe,Al)
 
12
O
 
23
(OH)
4.JB.65Freedite
Pb
 
15
(Cu,Fe
2+
 
)
 
3
[O
 
7
|Cl
 
10
|(AsO
 
3
)
 
4
]
4.JB.70Georgiadèsite
Pb
 
16
[(OH)
 
6
|Cl
 
14
|(AsO
 
4
)
 
4
]
4.JB.75Ekatite
(Fe
3+
 
,Fe
2+
 
,Zn)
 
12
(OH)
 
6
(AsO
 
3
)
 
6
[AsO
 
3
,HOSiO
 
3
]
 
2

Other Names for Graeserite

Synonyms:
IMA1996-010
Other Languages:
German:Graeserit
Spanish:Graeserita

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.
Industrial Uses:None

References for Graeserite

Reference List:Krezemnicki, M.S. and Reusser, E. (1998) Graeserite, Fe3+4Ti3As3+O13(OH) a new mineral species of the derbylite group from from the Mount Leone Nappe, Binntal Region, Western Alps, Switzerland. Canadian Mineralogist: 36: 1083-1088.

Schweizerische mineralogische und petrographische Mitteilungen: 78: 1-9.

Verbeek, E., Orosz, J., and Nikischer, T. (2006) Mineral News: 22(9): 8-9.

Internet Links for Graeserite

Search Engines:
  • Look for Graeserite on Google
  • Look for Graeserite images on Google
    • External Links:
  • Look for Graeserite on Webmineral
  • Look for Graeserite on Athena Mineralogy
  • Look for Graeserite on Wikipedia
  • Look for Graeserite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Graeserite in the Natural History Museum (London) online catalogue
  • Graeserite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Find Graeserite on www.crystalclassics.co.uk
  • Lapis Mineral Magazin
  • Fine Minerals from Dan Weinrich Minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • High-end worldwide specimens & outstanding customer service
  • Fabre Minerals - search for Graeserite specimens
  • Rare and Unusual minerals at Mineralogical Research Company
  • Search for - Graeserite - on e-Rocks Mineral Sales & Auctions
  • Top quality minerals from Kristalle of California
  • Buy Fine Minerals from mineralsweb.com
  • The Arkenstone - Fine Minerals
  • Buy from David K Joyce minerals
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Graeserite

    (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.
    Switzerland
     
    • Wallis (Valais)
      • Binn Valley
        • Lercheltini (Lärcheltini) area
    		M.S. Krzemnicki & E. Reusser (1998): Graeserite, Fe4Ti3AsO13(OH), a new mineral species of the derbylite group from the Monte Leone nappe, Binntal, Western Alps, Switzerland.- Canadian Mineralogist 36, 1083-1088.
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Ogdensburg
            • Sterling Hill
    		Verbeek, E. et al (2006) Mineral News: 22(9): 8-9.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    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: 5th Nov 2009 21:44:01