Miersite Mineral Data
General Miersite Information
Chemical Formula:
(Ag,Cu)I
Composition:
Molecular Weight = 223.69 gm
Copper 7.10 % Cu 8.00 % Cu2 O
Silver 36.17 % Ag 38.85 % Ag2 O
Iodine 56.73 % I 56.73 % I
- % I -3.58 % -O=I2
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Ag0.75 Cu0.25 I
Environment:
Forms a partial series with marshite.
IMA Status:
Valid Species (Pre-IMA) 1898
Locality:
Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data.
Name Origin:
Named for Henry Alexander Miers (1848-1942), English mineralogist, Oxford University.
Name Pronunciation:
Miersite
Synonym:
ICSD 61542
PDF 2-499
Miersite Image
Images:
Miersite Crystallography
Cell Dimensions:
a = 6.504, Z = 4; V = 275.13 Den(Calc)= 5.40
Crystal System:
Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: F4 3m
X Ray Diffraction:
By Intensity(I/Io ): 3.23(1), 1.95(0.8), 2.28(0.8),
Physical Properties of Miersite
Cleavage:
{111} Good, {111} Good, {111} Good
Color:
Greenish, Canary yellow, Light yellow.
Density:
5.64
Diaphaneity:
Transparent to subtranslucent
Fracture:
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Adamantine
Streak:
greenish yellow
Optical Properties of Miersite
Gladstone-Dale:
CI meas = 0 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = -0.044 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2222,KPDmeas = 0.2128,KC = 0.2128 Ncalc = 2.15 - 2.2
Optical Data:
Isotropic, n=2.2.
Calculated Properties of Miersite
Electron Density:
Bulk Density (Electron Density)=4.82 gm/cc note: Specific Gravity of Miersite =5.64 gm/cc.
Fermion Index:
Fermion Index = 0 Boson Index = 1
Photoelectric:
PEMiersite = 323.69 barns/electronU=PEMiersite x r Electron Density=1,558.79 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Miersite is Not Radioactive
Miersite Classification
Dana Class:
09.01.07.02 (09) Anhydrous and Hydrated Halides
(09.01) where A X
(09.01.07) Nantokite Series
09.01.07.01 Nantokite CuCl F4 3m 4 3m
09.01.07.02 Miersite (Ag,Cu)I F4 3m 4 3m
09.01.07.03 Marshite CuI F4 3m 4 3m
Strunz Class:
03.AA.05 03 - HALIDES
03.A - Simple Halides, Without H2O
03.AA -M:X = 1:1, 2:3, 3:5, etc.
03.AA.05 Marshite CuI F4 3m 4 3m
03.AA.05 Nantokite CuCl F4 3m 4 3m
03.AA.05 Miersite (Ag,Cu)I F4 3m 4 3m
Other Miersite Information
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
See Also:
Links to other databases for Miersite :
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
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Print or Cut-and-Paste your Miersite Specimen Label here :
Miersite
(Ag,Cu)I
Dana No: 09.01.07.02 Strunz No: 03.AA.05
Locality:
Notes:
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