Hemimorphite Mineral Data

General Hemimorphite Information

Chemical Formula:

Zn4Si2O7(OH)2•(H2O)

Composition:

Molecular Weight = 481.76 gm

Zinc 54.29 % Zn 67.58 % ZnO

Silicon 11.66 % Si 24.94 % SiO₂

Hydrogen 0.84 % H 7.48 % H₂O

Oxygen 33.21 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn₄Si₂O₇(OH)₂•(H₂O)

Environment:

Veins and beds in stratified calcareous rocks.

IMA Status:

Valid Species (Pre-IMA) 1853

Locality:

Nerchinak in Transbaikalia, Siberia. Link to MinDat.org Location Data.

Name Origin:

Named after the hemimorphic nature of the crystals.

Name Pronunciation:

Hemimorphite + Pronunciation

Synonym:

Calamine

Galmei

ICSD 30012

PDF 5-555

Zinc silicate

Hemimorphite Image

Images:

Hemimorphite

Comments: Lustrous, mostly colorless to slightly reddish-brown hemimorphite crystals, the largest 13 x 20 x 2 mm in size.
Location: Santa Eulalia, Chihuahua, Mexico. Scale: 25 x 10 x 25 mm.
© Dan Weinrich

Hemimorphite Crystallography

Axial Ratios:

a:b:c =0.7808:1:0.4776

Cell Dimensions:

a = 8.37, b = 10.719, c = 5.12, Z = 2; V = 459.36 Den(Calc)= 3.48

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Imm2

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

By Intensity(I/I_o): 3.104(1), 6.6(0.86), 3.288(0.75),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 3 0 1) ( 1 0 0) ( 0 1 0) ( 1 1 0) ( 0 3 1) ( 1 2 1) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.

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

Libowitzky E , Kohler T , Armbruster T , Rossman G R , European Journal of Mineralogy , 9 (1997) p.803-810, Proton disorder in dehydrated hemimorphite - IR spectroscopy, and X-ray structure refinement at low and ambient temperatures, T = 110 K

View Additional jPOWD Structure files for Hemimorphite
[1] [2] [3] [4]

Physical Properties of Hemimorphite

Cleavage:

{110} Perfect

Color:

Brown, Colorless, Greenish gray, Yellow brown, White.

Density:

3.4 - 3.5, Average = 3.45

Diaphaneity:

Transparent to translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).

Hardness:

5 - Apatite

Luminescence:

Fluorescent, Short UV=dull white, Long UV=dull white.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Hemimorphite

Gladstone-Dale:

CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1788,KPDmeas= 0.1804,KC= 0.1841
Ncalc = 1.63 - 1.64

Optical Data:

Biaxial (+), a=1.614, b=1.617, g=1.636, bire=0.0220, 2V(Calc)=44, 2V(Meas)=46. Dispersion none.

Calculated Properties of Hemimorphite

Electron Density:

Bulk Density (Electron Density)=3.32 gm/cc
note: Specific Gravity of Hemimorphite =3.45 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Hemimorphite= 27.43 barns/electron
U=PE_Hemimorphite x rElectron Density= 91.14 barns/cc.

Radioactivity:

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

Hemimorphite Classification

Dana Class:

56.01.02.01 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.01)with cations in [4] coordination

(56.01.02)Dana Group

56.01.02.01 Hemimorphite Zn4Si2O7(OH)2•(H2O) Imm2 mm2

Strunz Class:

09.BD.10 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BD -Si2O7 groups with additional anions;

09.BD.10 Hemimorphite Zn4Si2O7(OH)2•(H2O) Imm2 mm2

Other Hemimorphite Information

References:

NAME( Mason68) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Mason68)

See Also:

Links to other databases for Hemimorphite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - GeoScienceWorld
10 - Glendale Community College
11 - Google Images
12 - Google Scholar
13 - Handbook of Mineralogy (MinSocAm)
14 - Handbook of Mineralogy (UofA)
15 - MinDAT
16 - Mineralienatlas (Deutsch)
17 - Online Mineral Museum
18 - QUT Mineral Atlas
19 - Ruff.Info
20 - WWW-MINCRYST
21 - YupRocks

Search for Hemimorphite using:

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

Visit our Advertisers for Hemimorphite :

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

Ask about Hemimorphite 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 Hemimorphite Specimen Label here :

Hemimorphite

Zn4Si2O7(OH)2•(H2O)
Dana No: 56.01.02.01 Strunz No: 09.BD.10
Locality:

Notes: