Amakinite Mineral Data

Amakinite Mineral Data +

General Amakinite Information

Chemical Formula:

(Fe++,Mg)(OH)2

Composition:

Molecular Weight = 83.46 gm

Magnesium 5.82 % Mg 9.66 % MgO

Manganese 6.58 % Mn 8.50 % MnO

Iron 46.84 % Fe 60.26 % FeO

Hydrogen 2.42 % H 21.58 % H₂O

Oxygen 38.34 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_0.7Mg_0.2Mn²⁺_0.1(OH)₂

Environment:

Noted in a drill core as thin veins and pockets in kimberlite.

IMA Status:

Approved IMA 1962

Locality:

Lucky Eastern kimberlite pipe, [Udachnaya pipe, Daldyn-Alakit region, Yakutia], Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the Amakin Expedition, which prospected the Yakutain diamond deposits.

Search for Amakinite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Amakinite Crystallography

Axial Ratios:

a:c = 1:2.09917

Cell Dimensions:

a = 6.917, c = 14.52, Z = 12; V = 601.63 Den(Calc)= 2.76

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.3(1), 1.728(0.9), 2.8(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Note: cadmium iodide structure

Physical Properties of Amakinite

Cleavage:

[???] Indistinct

Color:

Yellow green, Light green.

Density:

2.925 - 2.98, Average = 2.95

Diaphaniety:

Transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Pearly

Magnetism:

Weakly magnetic

Optical Properties of Amakinite

Gladstone-Dale:

CI meas= -0.086 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.162 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2589,KPDmeas= 0.242,KC= 0.2227

Optical Data:

Uniaxial (+), w=1.707, e=1.722, bire=0.0150.

Calculated Properties of Amakinite

Electron Density:

r_electron=2.91 gm/cc
note: r_Amakinite=2.95 gm/cc.

Fermion Index

Fermion Index = 0.01594
Boson Index = 0.98406

Photoelectric:

PE_Amakinite= 15.67 barns/electron
U=PE_Amakinite x r_electron= 45.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Amakinite is Not Radioactive

Amakinite Classification

Dana Class:

6.2.1.2 (6)Hydroxides and Oxides Containing Hydroxyl

(6.2)where X++ (OH)2

(6.2.1)Brucite group (Rhombohedral: P3¯m1)

6.2.1.1 Brucite Mg(OH)2 P 3m1 3 2/m

6.2.1.2 Amakinite (Fe,Mg)(OH)2 P 3m1 3 2/m

6.2.1.3 Pyrochroite Mn(OH)2 P 3m1 3 2/m

6.2.1.4 Portlandite Ca(OH)2 P 3m1 3 2/m

6.2.1.5 Theophrastite Ni(OH)2 P 3m1 3 2/m

Strunz Class:

IV/F.03-20 IV - Oxides

IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure

IV/F.03 - Brucite series

IV/F.03-10 Brucite Mg(OH)2 P 3m1 3 2/m

IV/F.03-20 Amakinite (Fe,Mg)(OH)2 P 3m1 3 2/m

IV/F.03-30 Pyrochroite Mn(OH)2 P 3m1 3 2/m

IV/F.03-40 Theophrastite Ni(OH)2 P 3m1 3 2/m

IV/F.03-50 Paraotwayite Ni(OH)2-x(SO4,CO3)0.5xx=.5 Pm m

IV/F.03-60 Sweetite Zn(OH)2 P 4₁2₁2,P 4₃2₁2 4 2 2

IV/F.03-70 Ashoverite Zn(OH)2 I 4₁/amd 4/m 2/m 2/m

IV/F.03-80 Wulfingite Zn(OH)2 P 2₁2₁2₁ 2 2 2

IV/F.03-90 Spertiniite Cu(OH)2 C mc2₁ mm2

IV/F.03-100 Portlandite Ca(OH)2 P 3m1 3 2/m

Other Amakinite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Amakinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Amakinite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Amakinite :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

The GeoZone

Wrights Rock Shop

Translate Amakinite Mineral Data :

Ask about Amakinite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Amakinite Specimen Label here :

Amakinite

(Fe++,Mg)(OH)2
Dana No: 6.2.1.2 Strunz No: IV/F.03-20
Locality:

Notes: