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

Bismutoferrite

Big Photo

Schneeberg District, Erzgebirge, Saxony, Germany
© Thomas Witzke

Show Bismutoferrite Photos (5)
Formula:
Fe
3+
2
Bi[OH|(SiO
 
4
)
 
2
]
System:MonoclinicHardness:6


The bismuth analogue of Chapmanite, with which it is easily confused.

Classification of Bismutoferrite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/B.06-20
Nickel-Strunz 10th (pending) edition ID:9.ED.25

9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
Dana 8th edition ID:71.1.3.1

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
Hey's CIM Ref.:14.14.8

14 : Silicates not Containing Aluminum
14 : Silicates of V and Bi
mindat.org URL:http://www.mindat.org/min-667.html
Please feel free to link to this page.

Type Occurrence of Bismutoferrite

Type Locality:Schneeberg District, Erzgebirge, Saxony, Germany
Year of Discovery:1871

Physical Properties of Bismutoferrite

Hardness (Mohs):6

Crystallography of Bismutoferrite

Crystal System:Monoclinic
Cell Parameters:a = 5.21Å, b = 9.02Å, c = 7.74Å
β = 100.67°
Ratio:a:b:c = 0.578 : 1 : 0.858
Unit Cell Volume:V 357.45 ų (Calculated from Unit Cell)

Optical Data of Bismutoferrite

Type:Biaxial
RI values: nα = 1.930 nβ = 1.970 nγ = 2.010
Maximum Birefringence:δ = 0.080

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 Bismutoferrite

Formula:
Fe
3+
2
Bi[OH|(SiO
 
4
)
 
2
]
Essential elements:Bi, Fe, H, O, Si
All elements listed in formula:Bi, Fe, H, O, Si
Common Impurities:Al,As

Relationship of Bismutoferrite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.ED.05Dickite
Al
 
2
Si
 
2
O
 
5
(OH)
 
4
9.ED.05Kaolinite
Al
 
2
Si
 
2
O
 
5
(OH)
 
4
9.ED.05Nacrite
Al
 
2
Si
 
2
O
 
5
(OH)
 
4
9.ED.05Odinite
(Fe,Mg,Al,Fe,Ti,Mn)
 
2.4
(Si,Al)
 
2
O
 
5
(OH)
 
4
9.ED.10Halloysite
Al
 
2
Si
 
2
O
 
5
(OH)
 
4
9.ED.10Hisingerite
Fe
3+
2
Si
 
2
O
 
5
(OH)
 
4
·2H
 
2
O
9.ED.10Halloysite-7Å
Al
 
2
Si
 
2
O
 
5
(OH)
 
4
9.ED.15Amesite
Mg
 
2
Al[(OH)
 
4
|AlSiO
 
5
]
9.ED.15Antigorite
(Mg,Fe
2+
 
)
 
3
[(OH)
 
4
|Si
 
2
O
 
5
]
9.ED.15Berthierine
(Fe,Fe,Mg)
 
2-3
(Si,Al)
 
2
O
 
5
(OH)
 
4
9.ED.15Brindleyite
(Ni,Mg,Fe)
 
2
Al(Si,Al)O
 
5
(OH)
 
4
9.ED.15Caryopilite
(Mn,Mg)
 
3
Si
 
2
O
 
5
(OH)
 
4
9.ED.15Chrysotile
Mg
 
3
Si
 
2
O
 
5
(OH)
 
4
9.ED.15Cronstedtite
Fe
2+
2
Fe
3+
 
[(Si,Fe
3+
 
)
 
2
O
 
5
](OH)
 
4
9.ED.15Fraipontite
(Zn,Al)
 
3
[(OH)
 
4
|(Si,Al)
 
2
O
 
5
]
9.ED.15Greenalite
Fe
 
2-3
Si
 
2
O
 
5
(OH)
 
4
9.ED.15Kellyite
Mn
2+
2
Al[(OH)
 
4
|AlSiO
 
5
]
9.ED.15Lizardite
Mg
 
3
[(OH)
 
4
|Si
 
2
O
 
5
]
9.ED.15Manandonite
LiAl
 
4
Si
 
3
BO
 
10
(OH)
 
6
9.ED.15Népouite
(Ni,Mg)
 
3
Si
 
2
O
 
5
(OH)
 
4
9.ED.15Pecoraite
Ni
 
3
[(OH)
 
4
|Si
 
2
O
 
5
]
9.ED.20Allophane
(Al
 
2
O
 
3
)(SiO
 
2
)
 
1.3-2
·2.5-3H
 
2
O
9.ED.20Chrysocolla
(Cu,Al)
 
2
H
 
2
Si
 
2
O
 
5
(OH)
 
4
·nH
 
2
O
9.ED.20Imogolite
Al
 
2
SiO
 
3
(OH)
 
4
9.ED.20Neotocite
(Mn,Fe,Mg)SiO
 
3
·H
 
2
O
9.ED.25Chapmanite
Fe
3+
2
Sb
3+
 
[OH|(SiO
 
4
)
 
2
]
Related Minerals - Hey's Index Grouping:

- +
14.14.1Cavansite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
14.14.2Pentagonite
Ca(VO)Si
 
4
O
 
10
·4H
 
2
O
14.14.3Goldmanite
Ca
 
3
(V
3+
 
,Al,Fe
3+
 
)
 
2
[SiO
 
4
]
 
3
14.14.4Haradaite
SrVSi
 
2
O
 
7
14.14.5Saneroite
Na
 
2
(Mn,Mn)
 
10
Si
 
11
VO
 
34
(OH)
 
4
14.14.6Erlianite
(Fe,Mg)
 
4
(Fe,V)
 
2
Si
 
6
O
 
15
(OH,O)
 
8
14.14.7Eulytine
Bi
 
4
[SiO
 
4
]
 
3

Other Names for Bismutoferrite

Other Languages:
German:Bismutoferrit
Russian:Бисмутоферрит
Spanish:Bismutoferrita

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 Bismutoferrite

Reference List:American Mineralogist: 43: 656-670.

Soviet Physics – Crystallography: 22: 419-423.

Internet Links for Bismutoferrite

Search Engines:
  • Look for Bismutoferrite on Google
  • Look for Bismutoferrite images on Google
    • External Links:
  • Look for Bismutoferrite on Webmineral
  • Look for Bismutoferrite on Athena Mineralogy
  • Look for Bismutoferrite on Wikipedia
  • Look for Bismutoferrite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Bismutoferrite in the Natural History Museum (London) online catalogue
  • Bismutoferrite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Wendel Minerals - Auktion & Shop
  • Search for - Bismutoferrite - on e-Rocks Mineral Sales & Auctions
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • High-end worldwide specimens & outstanding customer service
  • SpiriferMinerals.com - high quality specimens
  • Edwards Minerals - Fine Specimens
  • Buy fine minerals and gemstones from Pala International
  • Buy Fine Minerals from mineralsweb.com
  • Fabre Minerals - search for Bismutoferrite specimens
  • Wilensky Fine Minerals
  • rare and unusual minerals mainly crystallized
  • Rare and Unusual minerals at Mineralogical Research Company
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

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

    Localities for Bismutoferrite

    Show Locality List (42 Items)
    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.
    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: 30th Oct 2009 21:13:17