Annite Mineral Data (original) (raw)

General Annite Information

Help on Chemical Formula: Chemical Formula:

KFe++3AlSi3O10(OH,F)2

Help on Composition: Composition:

Molecular Weight = 512.88 gm

Potassium 7.62 % K 9.18 % K2O

Aluminum 5.26 % Al 9.94 % Al2O3

Iron 32.67 % Fe 42.03 % FeO

Silicon 16.43 % Si 35.15 % SiO2

Hydrogen 0.29 % H 2.63 % H2O

Oxygen 35.87 % O

Fluorine 1.85 % F 1.85 % F

- % F -0.78 % -O=F2

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

KFe2+3AlSi3O10(OH)1.5F0.5

Help on Environment: Environment:

In magnesium-poor igneous and metamorphic rocks.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1863

Help on Locality: Locality:

In the USA, from Cape Ann, east of Rockport, Essex Co., Massachusetts, and on Pikes Peak, El Paso Co., Colorado. From Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

For the first noted occurrence at Cape Ann, Massachusetts, USA.

Help on Name Pronunciation: Name Pronunciation:

Annite Say ANNITE

Annite Image

Click Here for Larger Annite Image in a New Browser Window Images:

Click Here for Larger Annite Image Annite Comments: Bottle-green manganoan annite fragment. Location: Thiemendorf, Königshain, Oberlausitz, Saxony, Germany.Scale: Picture size 2.5 mm. © Thomas Witzke / Abraxas-Verlag

Annite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.5774:1:1.1024

Help on Cell Dimensions: Cell Dimensions:

a = 5.39, b = 9.334, c = 10.29, Z = 2; beta = 100° V = 509.83 Den(Calc)= 3.34

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 10.3(1), 3.38(0.8), 2.65(0.7),

Help on Forms: Forms:

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| | Forms:( 1 1 2) ( 2 2 1) ( 0 1 0) ( 0 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Annite Structure Window Crystal Structure:

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| | Hazen R M , Burnham C W , American Mineralogist , 58 (1973) p.889-900, The crystal structures of one-layer phlogopite and annite View Additional jPOWD Structure files for Annite [1] [10] [2] [3] [4] [5] [6] [7] [8] [9] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Annite

Help on Cleavage: Cleavage:

{???} Perfect

Help on Color: Color:

Reddish brown, Black.

Help on Density: Density:

3.17

Help on Diaphaneity: Diaphaneity:

Transparent to Subopaque

Help on Hardness: Hardness:

2.5-3 - Finger Nail-Calcite

Help on Luster: Luster:

Sub Metallic

Help on Streak: Streak:

brownish white

Optical Properties of Annite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.055 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2008,KPDmeas= 0.2116,KC= 0.2005
Ncalc = 1.64 - 1.67

Help on Optical Data: Optical Data:

Biaxial (-), a=1.625-1.631, b=1.69, g=1.691-1.697, bire=0.0660, 2V(Calc)=12-36, 2V(Meas)=0-25.

Calculated Properties of Annite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.26 gm/cc
note: Specific Gravity of Annite =3.34 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEAnnite = 11.32 barns/electron
U=PEAnnite x relectron= 36.85 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 107.24 (Gamma Ray American Petroleum Institute Units)
Concentration of Annite per GRapi unit = 0.93 (%)

Estimated Radioactivity from Annite - barely detectable

Annite Classification

Help on Dana Class: Dana Class:

71.02.02b.03 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.02)with 2:1 Layers

(71.02.02b)Mica Group (Biotite subgroup)

71.02.02b.01 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m

71.02.02b.01a Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m

71.02.02b.01b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m

71.02.02b.01c Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m

71.02.02b.02 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m

71.02.02b.03 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m

71.02.02b.03a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m

71.02.02b.04 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m

71.02.02b.05 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m

71.02.02b.05a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m

71.02.02b.06 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m

71.02.02b.07 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono

71.02.02b.08 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m

71.02.02b.08a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m

71.02.02b.08b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono

71.02.02b.09 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m

71.02.02b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m

71.02.02b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m

71.02.02b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m

71.02.02b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m

71.02.02b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m

71.02.02b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m

71.02.02b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m

71.02.02b.18 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m

Help on Strunz Class: Strunz Class:

09.EC.20 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.20 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m

09.EC.20 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m

09.EC.20 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m

09.EC.20 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m

09.EC.20 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m

09.EC.20 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono

09.EC.20 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m

09.EC.20 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m

09.EC.20 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m

09.EC.20 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m

09.EC.20 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m

09.EC.20 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m

09.EC.20 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m

09.EC.20 Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m

09.EC.20 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m

09.EC.20 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m

09.EC.20 Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m

09.EC.20 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m

09.EC.20 Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m

09.EC.20 Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m

09.EC.20 Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono

09.EC.20 Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m

09.EC.20 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m

09.EC.20 Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m

Other Annite Information

Help on References: References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Annite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

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Ask about Annite here :
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Print or Cut-and-Paste your Annite Specimen Label here :

Annite

KFe++3AlSi3O10(OH,F)2
Dana No: 71.02.02b.03 Strunz No: 09.EC.20
Locality:

Notes: