Jump to content
 







Main menu
   


Navigation  



Main page
Contents
Current events
Random article
About Wikipedia
Contact us
Donate
 




Contribute  



Help
Learn to edit
Community portal
Recent changes
Upload file
 








Search  

































Create account

Log in
 









Create account
 Log in
 




Pages for logged out editors learn more  



Contributions
Talk
 



















Contents

   



(Top)
 


1 Occurrence and association  





2 Crystal structure  





3 References  














Falsterite






Català
Euskara
 

Edit links
 









Article
Talk
 

















Read
Edit
View history
 








Tools
   


Actions  



Read
Edit
View history
 




General  



What links here
Related changes
Upload file
Special pages
Permanent link
Page information
Cite this page
Get shortened URL
Download QR code
Wikidata item
 




Print/export  



Download as PDF
Printable version
 
















Appearance
   

 






From Wikipedia, the free encyclopedia
 


Falsterite
General
CategoryPhosphate mineral
Formula
(repeating unit)
Ca2MgMn2+2(Fe2+0.5Fe3+0.5)4
Zn4(PO4)8(OH)4(H2O)14
IMA symbolFls[1]
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupP21/c
Unit cella = 6.39, b = 21.26
c = 15.37 [Å]; β = 90.56° (approximated); Z = 2
Identification
ColorGreenish-blue
Crystal habitthin plates, rectangular laths
Cleavage{010}, perfect
FractureUneven
LusterVitreous
StreakVery pale greenish-blue
DiaphaneityTransparent
Density2.78 (measured); 2.84 (calculated; approximated)
Optical propertiesBiaxal (-)
Refractive indexnα=1.58, nβ=1.60, nγ=1.61 (approximated)
PleochroismColorless to very pale yellow (X &Z), blue-green (Y)
DispersionStrong
References[2][3]

Falsterite is a rare phosphate mineral[3] with the formula Ca2MgMn2+2(Fe2+0.5Fe3+0.5)4Zn4(PO4)8(OH)4(H2O)14.[2] It is a pegmatitic mineral, related to the currently approved mineral ferraioloite.[3]

Occurrence and association

[edit]

Falsterite was found in Palermo No. 1 pegmatite, North Groton, Grafton County, New Hampshire, US. Co-type locality is pegmatite at Estes quarry, Baldwin, Cumberland County, Maine, US. Falsterite is a product of alteration of triphylite and sphalerite.[2]

Crystal structure

[edit]

Main features of the crystal structure of falsterite, which is somewhat similar to that of schoonerite, are:

The slabs are bridged by dimers of MgO6 octahedra that display edge-sharing. Magnesium-bearing octahedra share edges with zinc-bearing tetrahedra.[2]

References

[edit]
  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  • ^ a b c d Kampf, A.R., Mills, S.J., Simmons, W.B., Nizamoff, J.W., and Whitmore, R.W., 2012. Falsterite, Ca2MgMn2+2(Fe2+0.5Fe3+0.5)4Zn4(PO4)8(OH)4(H2O)14, a new secondary phosphate mineral from the Palermo No. 1 pegmatite, North Groton, New Hampshire. American Mineralogist 97(4), 496-502
  • ^ a b c "Falsterite: Falsterite mineral information and data". Mindat.org. Retrieved 2016-03-04.
  • t
  • e

  • Retrieved from "https://en.wikipedia.org/w/index.php?title=Falsterite&oldid=1140520239"

    Categories: 
    Zinc minerals
    Calcium minerals
    Magnesium minerals
    Manganese(II) minerals
    Iron(II,III) minerals
    Phosphate minerals
    Monoclinic minerals
    Minerals in space group 14
    Minerals described in 2012
    Phosphate mineral stubs
    Hidden category: 
    All stub articles
     



    This page was last edited on 20 February 2023, at 12:52 (UTC).

    Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.



    Privacy policy

    About Wikipedia

    Disclaimers

    Contact Wikipedia

    Code of Conduct

    Developers

    Statistics

    Cookie statement

    Mobile view



    Wikimedia Foundation
    Powered by MediaWiki