Mindat Logo
Home Page Log In Messageboard The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Axinite-(Fe)

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

New Melones Dam, Copperopolis, Calaveras Co., California, USA
© Dan & Diana Weinrich Minerals

Show Axinite-(Fe) Photos (345)



Formula:
Ca
 
2
Fe
2+
 
Al
 
2
BSi
 
4
O
 
15
OH
System:TriclinicColour:Brown, clove-brown, plum ...
Hardness:6½ - 7
Member of:Axinite Group
Name:From the Greek αξίνα ("axina") for "axe", in allusion to the common habit of its crystals, and iron dominance in the formula.


Axinite Group. The Fe2+ analogue of Axinite-(Mg) and Axinite-(Mn).

Visit gemdat.org for gemological information about Axinite-(Fe). Currently in public beta-test.

Classification of Axinite-(Fe)

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

9 : SILICATES (Germanates)
B : Sorosilicates
D : Si2O7 groups, with additional anions; cations in tetrahedral [4] and greater coordination
Dana 8th edition ID:56.2.2.1

56 : SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
2 : Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Hey's CIM Ref.:17.5.47

17 : Silicates Containing other Anions
5 : Borosilicates
mindat.org URL:http://www.mindat.org/min-1459.html
Please feel free to link to this page.

Type Occurrence of Axinite-(Fe)

Type Locality:St Christophe-en-Oisans, Bourg d'Oisans, Isère, Rhône-Alpes, France

Occurrences of Axinite-(Fe)

Geological Setting:Low to high grade regionally metamorphosed rocks, contact metamorphic rocks, pegmatites.

Physical Properties of Axinite-(Fe)

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Brown, clove-brown, plum blue, pearl gray
Streak:White
Hardness (Mohs):6½ - 7
Tenacity:Brittle
Cleavage:Distinct/Good
Good on {100}
Poor on {001} {110} {011}
Fracture:Irregular/Uneven, Conchoidal
Density (measured):3.25 - 3.28 g/cm3
Density (calculated):3.33 g/cm3

Crystallography of Axinite-(Fe)

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 7.1437(4) Å, b = 9.1898(6) Å, c = 8.9529(4) Å
α = 91.857(6)°, β = 98.188(5)°, γ = 77.349(4)°
Ratio:a:b:c = 0.777 : 1 : 0.974
Unit Cell Volume:V 567.63 ų (Calculated from Unit Cell)
Z:2
Morphology:Flattened, axe head shaped, granular, massive
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Axinite-(Fe)

Type:Biaxial (-)
RI values: nα = 1.672 - 1.693 nβ = 1.677 - 1.701 nγ = 1.681 - 1.704
2V:Measured: 69° to 87°, Calculated: 62° to 82°
Maximum Birefringence:δ = 0.009 - 0.011

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

Chemical Properties of Axinite-(Fe)

Formula:
Ca
 
2
Fe
2+
 
Al
 
2
BSi
 
4
O
 
15
OH
Essential elements:Al, B, Ca, Fe, H, O, Si
All elements listed in formula:Al, B, Ca, Fe, H, O, Si

Relationship of Axinite-(Fe) to other Species

Series:Forms a series with Axinite-(Mn) (see here)
Member of:Axinite Group
Other Members of Group:

- +
Axinite-(Mg)
Ca
 
2
MgAl
 
2
BSi
 
4
O
 
15
OH
Axinite-(Mn)
Ca
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
Tinzenite
(CaMn
2+
 
)
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
Related Minerals - Nickel-Strunz Grouping):

- +
9.BD.05Bertrandite
Be
 
4
(Si
 
2
O
 
7
)(OH)
 
2
9.BD.10Hemimorphite
Zn
 
4
Si
 
2
O
 
7
(OH)
 
2
 · H
 
2
O
9.BD.15Junitoite
CaZn
 
2
Si
 
2
O
 
7
 · H
 
2
O
9.BD.20Axinite-(Mg)
Ca
 
2
MgAl
 
2
BSi
 
4
O
 
15
OH
9.BD.20Axinite-(Mn)
Ca
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
9.BD.20Tinzenite
(CaMn
2+
 
)
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
9.BD.25Vistepite
SnMn
 
4
B
 
2
Si
 
4
O
 
16
(OH)
 
2
9.BD.30Boralsilite
Al
 
16
B
 
6
Si
 
2
O
 
37
9.BD.35Werdingite
(Mg,Fe)
 
2
Al
 
14
Si
 
4
B
 
4
O
 
37
Related Minerals - Hey's Index Grouping:

- +
17.5.1Manandonite
LiAl
 
4
(BSi
 
3
O
 
10
)(OH)
 
6
17.5.2Reedmergnerite
Na[BSi
 
3
O
 
8
]
17.5.3Searlesite
Na(H
 
2
BSi
 
2
O
 
7
)
17.5.4Olenite
Na(Al
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
(OH)
17.5.5Elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.6Kalborsite
K
 
6
Al
 
4
BSi
 
6
O
 
20
(OH)
 
4
Cl
17.5.7Boromuscovite
KAl
 
2
(BSi
 
3
O
 
10
)(OH)
 
2
17.5.8Poudretteite
KNa
 
2
B
 
3
Si
 
12
O
 
30
17.5.9Liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.10Datolite
Ca(HBSiO
 
5
)
17.5.11Danburite
CaB
 
2
Si
 
2
O
 
8
17.5.12Howlite
Ca
 
2
B
 
5
SiO
 
9
(OH)
 
5
17.5.13Bakerite
Ca
 
4
(H
 
5
B
 
5
Si
 
3
O
 
20
)
17.5.14Oyelite
Ca
 
10
Si
 
8
B
 
2
O
 
29
 · 12.5H
 
2
O
17.5.15Kornerupine
Mg
 
3
Al
 
6
(Si,Al,B)
 
5
O
 
21
(OH)
17.5.16Harkerite
Ca
 
12
Mg
 
4
Al(BO
 
3
)
 
3
(SiO
 
4
)
 
4
(CO
 
3
)
 
5
 · H
 
2
O
17.5.17Serendibite
(Ca,Na)
 
2
(Mg,Fe
2+
 
)
 
3
(Al,Fe
3+
 
)
 
3
[O
 
2
|(Si,Al,B)
 
6
O
 
18
]
17.5.18Stillwellite-(Ce)
(Ce,La,Ca)BSiO
 
5
17.5.19Tadzhikite-(Ce)
(Ca,Ce)
 
4
(Ce,Y)
 
2
(Ti
4+
 
,Fe
3+
 
,Al)[B
 
4
Si
 
4
O
 
22
](OH)
 
2
17.5.20Melanocerite-(Ce)
(Ce,Ca)
 
5
(Si,B)
 
3
O
 
12
(OH,F) · nH
 
2
O
17.5.21Okanoganite-(Y)
(Na,Ca)
 
3
(Y,Ce)
 
12
Si
 
6
B
 
2
O
 
27
F
 
14
17.5.22Tritomite-(Ce)
(Ce,La,Y,Th)
 
5
(Si,B)
 
3
(O,OH,F)
 
13
17.5.23Tritomite-(Y)
(Y,Ca,La,Fe)
 
5
(Si,B,Al)
 
3
(O,OH,F)
 
13
17.5.24Cappelenite-(Y)
Ba(Y,Ce)
 
6
Si
 
3
B
 
6
O
 
24
F
 
2
17.5.25Dumortierite
(Al,Fe
3+
 
)
 
7
(SiO
 
4
)
 
3
(BO
 
3
)O
 
3
17.5.26Holtite
Al
 
6
(Al,Ta)(SiO
 
4
,SbO
 
4
,AsO
 
4
)
 
3
(BO
 
3
)O
 
3
17.5.27Dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.28 Ferridravite
17.5.29Axinite-(Mg)
Ca
 
2
MgAl
 
2
BSi
 
4
O
 
15
OH
17.5.30Uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F/OH)
17.5.31Garrelsite
Ba
 
3
NaSi
 
2
B
 
7
O
 
16
(OH)
 
4
17.5.32Tienshanite
KNa
 
3
Na
 
6
Ca
 
2
Ba
 
6
Mn
 
6
(Ti
4+
 
,Nb)
 
6
B
 
12
Si
 
36
O
 
114
(O,OH,F)
 
11
17.5.33Leucosphenite
BaNa
 
4
Ti
 
2
B
 
2
Si
 
10
O
 
30
17.5.34Taramellite
Ba
 
4
(Fe
3+
 
,Ti,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
17.5.35Titantaramellite
Ba
 
4
(Ti,Fe
3+
 
,Fe
2+
 
,Mg)
 
4
(B
 
2
Si
 
8
O
 
27
)O
 
2
Cl
 
x
17.5.36Nagashimalite
Ba
 
4
(V,Ti)
 
4
B
 
2
Si
 
8
O
 
27
(O,OH)
 
2
Cl
17.5.37Chromium-dravite
Na(Mg
 
3
)Cr
3+
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.38Wawayandaite
Ca
 
6
Mn
 
2
BBe
 
9
Si
 
6
O
 
23
(OH,Cl)
 
15
17.5.39Werdingite
(Mg,Fe)
 
2
Al
 
14
Si
 
4
B
 
4
O
 
37
17.5.40Axinite-(Mn)
Ca
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
17.5.41Axinite
17.5.42Tinzenite
(CaMn
2+
 
)
 
2
Mn
2+
 
Al
 
2
BSi
 
4
O
 
15
(OH)
17.5.44Schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.45Fluor-buergerite
Na(Fe
3+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
F
17.5.46Feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
17.5.48Homilite
Ca
 
2
(Fe
2+
 
,Mg)B
 
2
Si
 
2
O
 
10
17.5.49Grandidierite
(Mg,Fe
2+
 
)(Al,Fe
3+
 
)
 
3
(SiO
 
4
)(BO
 
3
)O
 
2
17.5.50Hyalotekite
(Ba,Pb,Ca,K)
 
6
(B,Si,Al)
 
2
(Si,Be)
 
10
O
 
28
(F,Cl)
17.5.51Hellandite-(Y)
(Ca,Y)
 
6
(Al,Fe
3+
 
)Si
 
4
B
 
4
O
 
20
(OH)
 
4

Other Names for Axinite-(Fe)

Synonyms:
FeraxiniteFerro-axinite
Other Languages:
Esperanto:Feroaksinito
German:Feraxinit
Japanese:鉄斧石
Russian:Ферроаксинит
Аксинит-(Fe)
Spanish:Feraxinita

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 Axinite-(Fe)

Reference List:

- +
Anderson, C. (1906) Mineralogical Notes: No. III - Axinite, petterdite, crocoite, datolite. Records of the Australian Museum: 6(3), 133-144.

American Mineralogist (1981): 66: 428-431.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

J. Filip, U. Kolitsch, M. Novák and O. Schneeweiss (2006): The crystal structure of near-end-member ferroaxinite from an iron-contaminated pegmatite at Malešov, Czech Republic. Can. Mineral. 44, 1159-1170.

Internet Links for Axinite-(Fe)

Search Engines:
  • Look for Axinite-(Fe) on Google
  • Look for Axinite-(Fe) images on Google
    • External Links:
  • Look for Axinite-(Fe) on Webmineral
  • Look for Axinite-(Fe) on Athena Mineralogy
  • Look for Axinite-(Fe) on Wikipedia
  • Look for Axinite-(Fe) on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Ferro-Axinite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • The Arkenstone - Fine Minerals
  • Search for minerals at Heliodor
  • Buy from David K Joyce minerals
  • Fine Minerals from Weinrich Minerals, Inc.
  • SpiriferMinerals.com - high quality low prices
  • Axinite-(Fe) specimens for sale - minfind.com
  • Search for Axinite-(Fe) on Well-Arranged Molecules
  • Top quality minerals from Kristalle of California
  • Fabre Minerals - search for Axinite-(Fe) specimens
  • rare and unusual minerals mainly crystallized
  • Find Axinite-(Fe) on www.crystalclassics.co.uk
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
    • Specimens:The following Axinite-(Fe) specimens are currently listed for sale on minfind.com.
    Jobs:
  • Mining & Geology Jobs

    • Localities for Axinite-(Fe)

    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.
    Show Locality List (240 Items)
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2013. 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. Mindat does not offer minerals for sale. 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 Apr 2013 21:17:42
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds
    New Locality Added: Mount Poro, Vibo Valentia Province, Calabria, ItalyFrom Ferdinando Giovine, 26th May 2013 08:11:11