Orthoericssonite Mineral Data

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

General Orthoericssonite Information

Chemical Formula:

BaMn2(Fe+++O)Si2O7(OH)

Composition:

Molecular Weight = 504.22 gm

Barium 27.24 % Ba 30.41 % BaO

Manganese 21.79 % Mn 28.14 % MnO

Iron 11.08 % Fe 15.84 % Fe₂O₃

Silicon 11.14 % Si 23.83 % SiO₂

Hydrogen 0.20 % H 1.79 % H₂O

Oxygen 28.56 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaMn²⁺₂Fe³⁺Si₂O₈(OH)

Environment:

In a ¯ne-grained manganoan aegirine zone in well-banded tephroite-rhodonite-manganoan aegirine skarn. Dimorphous with ericssonite.

IMA Status:

Approved IMA 1971

Locality:

From Langban, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for its ORTHOrhombic crystallization and relation to ericssonite.

Name Pronunciation:

Orthoericssonite + Pronunciation

Synonym:

ICSD 201041

PDF 29-185

Orthoericssonite Image

Images:

Click Here for Larger Orthoericssonite Image

Orthoericssonite Ericssonite Tephroite

Comments: Dark brown ericssonite, intergrown with orthoericssonite, with pink rhodonite, light brown diopside (var. schefferite) and gray tephroite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Orthoericssonite Crystallography

Axial Ratios:

a:b:c =2.9058:1:0.7711

Cell Dimensions:

a = 20.3, b = 6.986, c = 5.387, Z = 4; V = 763.96 Den(Calc)= 4.38

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmmn

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

By Intensity(I/I_o): 3.28(1), 5.08(0.6), 2.536(0.35),

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

Matsubara S , Mineralogical Journal , 10 (1980) p.107-121, The crystal structure of orthoericssonite, Locality: Hijikuzu mine, Iwate Prefecture, japan

Physical Properties of Orthoericssonite

Cleavage:

{100} Perfect, {011} Distinct

Color:

Reddish black.

Density:

4.21

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

4.5 - Between Fluorite and Apatite

Streak:

brown

Optical Properties of Orthoericssonite

Gladstone-Dale:

CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1925,KPDmeas= 0.2003,KC= 0.1999
Ncalc = 1.84 - 1.88

Optical Data:

Biaxial (+), a=1.802, b=1.84, g=1.888, bire=0.0860, 2V(Calc)=86, 2V(Meas)=50.

Calculated Properties of Orthoericssonite

Electron Density:

Bulk Density (Electron Density)=3.89 gm/cc
note: Specific Gravity of Orthoericssonite =4.21 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_{Orthoericssonite}= 127.88 barns/electron
U=PE_{Orthoericssonite} x rElectron Density= 497.58 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Orthoericssonite is Not Radioactive

Orthoericssonite Classification

Dana Class:

56.02.06c.05 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.02)with cations in [4] and/or >[4] coordination

(56.02.06c)Seidozerite - Lamprophyllite group (Lamprophyllite subgroup)

56.02.06c.01 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m

56.02.06c.02 Delindeite Ba2(Na,K,[])3(Ti,Fe)[Ti2(O,OH)4Si4O14](H2O,OH)2 A2/m 2/m

56.02.06c.03 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m

56.02.06c.04 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m

56.02.06c.05 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m

56.02.06c.06 Andremeyerite BaFe(Fe,Mn,Mg)Si2O7 P 2₁/c 2/m

56.02.06c.07 Eveslogite! (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Fe,Mn)12(OH)12Si48O144](F,OH,Cl)14 P 2/m 2/m

56.02.06c.08 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m

Strunz Class:

09.BE.25 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BE -Si2O7 groups with additional anions;

09.BE.25 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m

09.BE.25 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m

09.BE.25 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m

09.BE.25 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m

09.BE.25 Seidozerite (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 P 2/c 2/m

09.BE.25 Nabalamprophyllite! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m

09.BE.25 Grenmarite! (Zr,Mn)2(Zr,Ti)(Mn,Na)(Na,Ca)4(Si2O7)2(O,F)4 P 2/c 2/m

Other Orthoericssonite Information

References:

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

See Also:

Links to other databases for Orthoericssonite :
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 Orthoericssonite using:

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

Visit our Advertisers for Orthoericssonite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Diamond Dan Publications

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Orthoericssonite Mineral Data :

Ask about Orthoericssonite 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 Orthoericssonite Specimen Label here :

Orthoericssonite

BaMn2(Fe+++O)Si2O7(OH)
Dana No: 56.02.06c.05 Strunz No: 09.BE.25
Locality:

Notes: