Joesmithite Mineral Data

Advertisment

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

General Joesmithite Information

Chemical Formula:

PbCa2(Mg,Fe++,Fe+++)5Si6Be2O22(OH)2

Composition:

Molecular Weight = 1,043.42 gm

Calcium 7.30 % Ca 10.21 % CaO

Magnesium 5.82 % Mg 9.66 % MgO

Manganese 1.58 % Mn 2.04 % MnO

Beryllium 1.55 % Be 4.31 % BeO

Iron 10.70 % Fe 2.75 % FeO / 12.24 % Fe₂O₃

Silicon 16.15 % Si 34.55 % SiO₂

Hydrogen 0.17 % H 1.55 % H₂O

Lead 19.86 % Pb 20.62 % Pb₂O

Oxygen 36.49 % O

Fluorine 0.36 % F 0.36 % F

- % F -0.15 % -O=F₂

______ ______

100.00 % 98.16 % = TOTAL OXIDE

Empirical Formula:

PbCa_1.9Mg_2.5Fe³⁺_1.6Fe²⁺_0.4Mn²⁺_0.3Si₆Be_1.8O₂₂(OH)_1.8F_0.2

Environment:

Metamorphosed manganese ores.

IMA Status:

Approved IMA 1968

Locality:

At Lanban, Varmalnd, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Prof. Joseph Victor Smith (1928-), English-American mineralogist and petrologist of the University of Chicago, Chicago, Illinois, USA.

Name Pronunciation:

Joesmithite + Pronunciation

Synonym:

ICSD 74285

PDF 22-531

Search for Joesmithite 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.

Joesmithite Crystallography

Axial Ratios:

a:b:c =0.5528:1:0.2925

Cell Dimensions:

a = 9.88, b = 17.87, c = 5.227, Z = 2; beta = 105.67° V = 888.56 Den(Calc)= 3.90

Crystal System:

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

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

By Intensity(I/I_o): 3.33(1), 2.53(0.6), 2.564(0.6),

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

Moore P B , Davis A M , Van Derveer D G , Sen Gutpa P K , Mineralogy and Petrology , 48 (1993) p.97-113, Joesmithite, a plumbous amphibole revisited and comments on bond valences

Physical Properties of Joesmithite

Cleavage:

{110} Perfect

Color:

Black.

Density:

3.83

Diaphaneity:

Transparent to Translucent

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5.5 - Knife Blade

Luster:

Subadamantine

Streak:

light brown

Optical Properties of Joesmithite

Gladstone-Dale:

CI meas= -0.132 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.112 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1959,KPDmeas= 0.1995,KC= 0.1762
Ncalc = 1.67 - 1.69

Optical Data:

Biaxial (+), a=1.747, b=1.765, g=1.78, bire=0.0330, 2V(Calc)=84, 2V(Meas)=60-70.

Pleochroism (x):

Olive.

Pleochroism (y):

olive brown.

Pleochroism (z):

Olive.

Calculated Properties of Joesmithite

Electron Density:

Bulk Density (Electron Density)=3.70 gm/cc
note: Specific Gravity of Joesmithite =3.90 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Joesmithite= 326.93 barns/electron
U=PE_Joesmithite x rElectron Density=1,209.00 barns/cc.

Radioactivity:

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

Joesmithite Classification

Dana Class:

66.01.04.01 (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.01)with P=2 amphibole configuration

(66.01.04)Dana Group

66.01.04.01 Joesmithite PbCa2(Mg,Fe,Fe)5Si6Be2O22(OH)2 P 2/a 2/m

Strunz Class:

09.DE.10 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family

09.DE.10 Ferritschermakite Ca2(Fe,Mg)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

09.DE.10 Ferro-actinolite []Ca2Fe5Si8O22(OH)2 C 2/m 2/m

09.DE.10 Aluminoferrotschermakite! []Ca2(Fe2)3Al2(Si6Al2)O22(OH)2 C 2/m 2/m

09.DE.10 Edenite NaCa2Mg5Si7AlO22(OH)2 C 2/m 2/m

09.DE.10 Ferri-ferrotschermakite! []Ca2(Fe2)3(Fe3)2(Si6Al2)O22(OH)2 C 2/m 2/m

09.DE.10 Actinolite Ca2(Mg,Fe)5Si8O22(OH)2 C 2/m 2/m

09.DE.10 Cannilloite! CaCa2Mg4Al(Si5Al3)O22(OH)2 C 2/m 2/m

09.DE.10 Fluorocannilloite! CaCa2(Mg4Al)Si5Al3O22F2 C 2/m 2/m

09.DE.10 Ferrohornblende []Ca2[Fe4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m

09.DE.10 Ferrokaersutite NaCa2(Fe4Ti)Si6Al2O22(OH)2 C 2/m 2/m

09.DE.10 Ferro-edenite NaCa2Fe5Si7AlO22(OH)2 C 2/m 2/m

09.DE.10 Ferro-aluminotschermakite* Ca2Fe3Al2(Si7Al)O22(OH)2 C 2/m 2/m

09.DE.10 Potassic-magnesiosadanagaite (K,Na)Ca2(Mg,Fe,Al,Ti)5[(Si,Al)8O22](OH)2 C 2,Cm,C 2/m Mono

09.DE.10 Fluoro-edenite! NaCa2Mg5Si7AlO22(F,OH)2 C 2/m 2/m

09.DE.10 Hastingsite NaCa2(Fe4Fe)Si6Al2O22(OH)2 C 2/m 2/m

09.DE.10 Ferrotschermakite! []Ca2(Fe3AlFe)Si6Al2O22(OH) C 2/m 2/m

09.DE.10 Ferroferritschermakite* Ca2(Fe,Mg)3Fe2(Si7Al)O22(OH)2 C 2/m 2/m

09.DE.10 Ferropargasite NaCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m

09.DE.10 Joesmithite PbCa2(Mg,Fe,Fe)5Si6Be2O22(OH)2 P 2/a 2/m

09.DE.10 Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 C 2/m 2/m

09.DE.10 Magnesiohastingsite NaCa2(Mg4Fe)Si6Al2O22(OH)2 C 2/m 2/m

09.DE.10 Magnesiohornblende Ca2[Mg4(Al,Fe)]Si7AlO22(OH)2 C 2/m 2/m

09.DE.10 Pargasite NaCa2(Mg,Fe)4Al(Si6Al2)O22(OH)2 C 2/m 2/m

09.DE.10 Potassicsadanagaite! (K,Na)Ca2[Fe3(Al,Fe)2][Si5Al3O22](OH)2 C 2,Cm,C 2/m Mono

09.DE.10 Potassicpargasite! (K,Na)Ca2(Mg,Fe)5Si8O22(OH,F)2 C 2/m 2/m

09.DE.10 Sadanagaite (K,Na)Ca2(Fe,Mg,Al,Ti)5[(Si,Al)8O22](OH)2 C 2,Cm,C 2/m Mono

09.DE.10 Tschermakite []Ca2(Mg3AlFe)Si6Al2O22(OH)2 C 2/m 2/m

09.DE.10 Tremolite []Ca2Mg5Si8O22(OH)2 C 2/m 2/m

09.DE.10 Fluoro-magnesiohastingsite! (Na,K)Ca2(Mg,Fe,Ti)5(Si,Al)8O22F2 C 2/m 2/m

09.DE.10 Parvo-manganotremolite! [](CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m

09.DE.10 Fluoropargasite! NaCa2(Mg3FeAl)5(Si6Al2O22)F2 C 2/m 2/m

09.DE.10 Parvo-mangano-edenite! Na(CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m

09.DE.10 Magnesiosadanagaite! NaCa2[Mg3(Al,Fe)2]Si5AlO22(OH)2 C 2/m 2/m

09.DE.10 Fluoro-potassichastingsite! KCa2(Fe2,Mg2,Fe)S5(Si6Al2)8O22F2 C 2/m 2/m

09.DE.10 Chloro-potassichastingsite! KCa2(Fe3MgFe)(Si6Al2)S8O22Cl2 C 2/m 2/m

09.DE.10 Potassic-magnesiohastingsite! (K,Na)Ca2(Mg,Fe,Fe,Al)5(Si,Al)8O22(OH,Cl)2 C 2/m 2/m

09.DE.10 Potassic-ferropargasite KCa2(Fe4Al)Si6Al2O22(OH)2 C 2/m 2/m

Other Joesmithite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

See Also:

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

Search for Joesmithite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Joesmithite :

A Bijoux Google Search for Joesmithite
Adam's Minerals Google Search for Joesmithite
Cape Minerals Google Search for Joesmithite
Dakota Matrix Minerals Google Search for Joesmithite
Excalibur Mineral Corp. Google Search for Joesmithite
Exceptional Minerals Google Search for Joesmithite
John Betts Fine Minerals Search for Joesmithite
McDougall Minerals Google Search for Joesmithite
Mineral News Website Link
Rock and Mineral Shows Google Search for Joesmithite
Weinrich Minerals, Inc. Google Search for Joesmithite

Ask about Joesmithite 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 Joesmithite Specimen Label here :

Joesmithite

PbCa2(Mg,Fe++,Fe+++)5Si6Be2O22(OH)2
Dana No: 66.01.04.01 Strunz No: 09.DE.10
Locality:

Notes: