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

Amakinite

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



Formula:
(Fe
2+
 
,Mg)(OH)
 
2
System:TrigonalColour:Pale green to ...
Hardness:3½ - 4
Name:For the Amakin Expedition, which prospected the Yakutian diamond deposits.


Brucite Group

Classification of Amakinite

IMA status:Approved
Strunz 8th edition ID:4/F.03-20
Nickel-Strunz 10th (pending) edition ID:4.FE.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
E : Hydroxides with OH, without H2O; sheets of edge-sharing octahedra
Dana 8th edition ID:6.2.1.2

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
2 : X(OH)2
Hey's CIM Ref.:7.20.10

7 : Oxides and Hydroxides
20 : Oxides of Fe
mindat.org URL:http://www.mindat.org/min-180.html
Please feel free to link to this page.

Type Occurrence of Amakinite

Type Locality:Udachnaya-Vostochnaya pipe, Daldyn, Daldyn-Alakit kimberlite field, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
General Appearance of Type Material:rhombohedra to 1.5 cm; typically in irregular grains
Place of Conservation of Type Material:A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 69547.
Year of Discovery:1962
Geological Setting of type material:in a drill core, in thin veins and pockets in kimberlite
Associated Minerals at type locality:
Serpentine GroupSerpentine Group

Physical Properties of Amakinite

Diaphaneity (Transparency):Translucent
Colour:Pale green to yellow-green; rapidly turns brown when exposed to air, due to formation of Fe(OH)3
Hardness (Mohs):3½ - 4
Cleavage:Poor/Indistinct
observed in some grains
Fracture:Irregular/Uneven
Density (measured):2.925 - 2.98 g/cm3
Density (calculated):2.74 g/cm3

Crystallography of Amakinite

Crystal System:Trigonal
Cell Parameters:a = 6.917Å, c = 14.52Å
Ratio:a:c = 1 : 2.099
Unit Cell Volume:V 601.63 ų (Calculated from Unit Cell)
Z:12
Morphology:Rhombohedra {1011}, modified by {1012}, {1014}, {1123}, {2025} and {0001} to 2 cm; typically in irregular grains.
X-Ray Powder Diffraction:
d-spacingIntensity
2.30 (10)
1.728 (9)
2.80 (8)
1.530 (8)
5.49 (7)
1.551 (7)
1.386 (7)
Comments:Material from the type locality

Optical Data of Amakinite

Type:Uniaxial (+)
RI values: nω = 1.707 nε = 1.722
Maximum Birefringence:δ = 0.015

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

Chemical Properties of Amakinite

Formula:
(Fe
2+
 
,Mg)(OH)
 
2
Essential elements:Fe, H, O
All elements listed in formula:Fe, H, Mg, O
Analytical Data:Analytical results of material from the type locality
SiO2 (0.43)
Al2O3 (0.32)
Fe2O3 (31.58)
FeO (30.40)
MnO (3.63)
MgO (10.10)
H2O (22.95)
CO2 (0.32)

sum 99.91 wt.-%
Empirical Formula:
(Fe
 
0.73
Mg
 
0.22
Mn
 
0.05
)
 
=1.00
(OH)
 
2

Relationship of Amakinite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.FE.05Brucite
Mg(OH)
 
2
4.FE.05Portlandite
Ca(OH)
 
2
4.FE.05Pyrochroite
Mn(OH)
 
2
4.FE.05Theophrastite
Ni(OH)
 
2
4.FE.10Bayerite
Al(OH)
 
3
4.FE.10Doyleite
Al(OH)
 
3
4.FE.10Gibbsite
Al(OH)
 
3
4.FE.10Nordstrandite
Al(OH)
 
3
4.FE.15Böhmite
AlO(OH)
4.FE.15Lepidocrocite
γ-Fe
3+
 
O(OH)
4.FE.20Grimaldiite
CrO(OH)
4.FE.20Heterogenite
CoO(OH)
4.FE.25Feitknechtite
Mn
3+
 
O(OH)
4.FE.25Lithiophorite
(Al,Li)MnO
 
2
(OH)
 
2
4.FE.30Quenselite
PbMnO
 
2
(OH)
4.FE.35Ferrihydrite
Fe
3+
5
O
 
3
(OH)
 
9
4.FE.40Feroxyhyte
Fe
3+
 
O(OH)
4.FE.40Vernadite
(Mn
4+
 
,Fe
3+
 
,Ca,Na)(O,OH)
 
2
 · nH
 
2
O
4.FE.45Quetzalcoatlite
Zn
 
6
Cu
 
3
(TeO
 
6
)
 
2
(OH)
 
6
 · Ag
 
x
Pb
 
y
Cl
 
x+2y
Related Minerals - Hey's Index Grouping:

- +
7.20.1Wüstite
FeO
7.20.2Magnetite
Fe
2+
 
Fe
3+
2
O
 
4
7.20.3Maghemite
Fe
3+
2
O
 
3
7.20.4Hematite
Fe
 
2
O
 
3
7.20.5Goethite
α-Fe
3+
 
O(OH)
7.20.6Akaganeite
β-Fe
3+
 
O(OH,Cl)
7.20.7Feroxyhyte
Fe
3+
 
O(OH)
7.20.8Lepidocrocite
γ-Fe
3+
 
O(OH)
7.20.9Ferrihydrite
Fe
3+
5
O
 
3
(OH)
 
9
7.20.11Magnesioferrite
MgFe
3+
2
O
 
4
7.20.12Muskoxite
Mg
 
7
Fe
 
4
O
 
13
 · 10H
 
2
O
7.20.13Srebrodolskite
Ca
 
2
Fe
3+
2
O
 
5
7.20.14Hercynite
Fe
2+
 
Al
 
2
O
 
4
7.20.15Brownmillerite
Ca
 
2
(Al,Fe
3+
 
)
 
2
O
 
5

Other Names for Amakinite

Other Languages:
German:Amakinit
Russian:Амакинит
Spanish:Amakinita

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 Amakinite

Reference List:

- +
Kozlov, I. T. and Lershov, P. P. (1962): Amakinite, a new mineral of the brucite-pyrochroite group. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 91, 72-77 (in Russian). - American Mineralogist (1962), 47, 1218 (abstract).

Sviridov, V. F. and Yakovlevskaya, T. A. (1973): New data on amakinite from the kimberlitic pipe "Udachnaya". Izv. Akad. Nauk SSSR, Ser. Geol. 10, 144-147 (in Russian).

Lutz, H. D., Möller, H. and Schmidt, M. (1994): Lattice vibration spectra. Part LXXXII. Brucite-type hydroxides M(OH)2 (M = Ca, Mn, Co, Fe, Cd) - IR and Raman spectra, neutron diffraction of Fe(OH)2. Journal of Molecular Structure 328, 121-132.

Anthony, J. W., et al. (1997): Handbook of Mineralogy, Vol. 3, 13.

Internet Links for Amakinite

Search Engines:
  • Look for Amakinite on Google
  • Look for Amakinite images on Google
    • External Links:
  • Look for Amakinite on Webmineral
  • Look for Amakinite on Athena Mineralogy
  • Look for Amakinite on Wikipedia
  • Look for Amakinite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Amakinite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • Buy minerals from YourMineralCollection
  • The Arkenstone - Fine Minerals
  • Fine and rare minerals from mintreasure.com
  • High-end worldwide specimens & outstanding customer service
  • Search for minerals at Heliodor
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Amakinite specimens for sale - minfind.com
  • webminerals
  • Fabre Minerals - search for Amakinite specimens
  • Minerals from Darwin Natural History
  • SpiriferMinerals.com - high quality low prices
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Amakinite

    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.
    Hide Locality List
    (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.
    Germany
     
    • Bavaria
      • Lower Bavaria
        • Bavarian Forest
          • Zwiesel
            • Bodenmais
    		Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
        • Daldyn-Alakit kimberlite field
          • Daldyn
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2012. 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: 25th Nov 2012 20:04:16
    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