Hodgkinsonite Mineral Data

[What's New] [Mineral Galleries] [About Us] [Contacts] [Login]
At AA Mineral Specimens, we source quality Mineral Specimens, Fossils, Gemstones,
Decorative Stones, Lapidary Material and Specimen Sets world-wide

General Hodgkinsonite Information

Chemical Formula:

MnZn2SiO4(OH)2

Composition:

Molecular Weight = 311.82 gm

Manganese 17.62 % Mn 22.75 % MnO

Zinc 41.94 % Zn 52.20 % ZnO

Silicon 9.01 % Si 19.27 % SiO₂

Hydrogen 0.65 % H 5.78 % H₂O

Oxygen 30.79 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺Zn₂(SiO₄)(OH)₂

Environment:

Metamorphosed zinc-manganese deposit.

IMA Status:

Valid Species (Pre-IMA) 1913

Locality:

Franklin, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.

Name Origin:

Named for H. H. Hodgkinson, assistant underground supervisor of Franklin mine who discovered the mineral.

Name Pronunciation:

Hodgkinsonite + Pronunciation

Synonym:

ICSD 25709

PDF 35-554

Hodgkinsonite Image

Images:

Click Here for Larger Hodgkinsonite Image

Hodgkinsonite Hetaerolite

Comments: Dark crystal of hetaerolite on hodgkinsonite.
Location: Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Hodgkinsonite

Comments: Pink, transparent crystal of hodgkinsonite with franklinite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Hodgkinsonite Crystallography

Axial Ratios:

a:b:c =2.2121:1:1.5385

Cell Dimensions:

a = 11.764, b = 5.318, c = 8.182, Z = 4; beta = 95.42° V = 509.59 Den(Calc)= 4.06

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 2.869(1), 2.965(0.8), 11.82(0.55),

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

Rentzeperis P J , Zeitschrift fur Kristallographie , 119 (1963) p.117-138, The crystal structure of hodgkinsonite Zn2Mn[(OH)2|SiO4], Locality: Franklin, New Jersey, Note: y(H2) corrected

Physical Properties of Hodgkinsonite

Cleavage:

{???} Perfect

Color:

Light pink, Orange, Reddish brown.

Density:

3.91

Diaphaneity:

Translucent to subtranslucent to opaque

Fracture:

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

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

4.5-5 - Near Apatite

Luminescence:

Fluorescent, Long UV=red, weak pink dull dark purple.

Luster:

Vitreous (Glassy)

Optical Properties of Hodgkinsonite

Gladstone-Dale:

CI meas= -0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1812,KPDmeas= 0.1882,KC= 0.187
Ncalc = 1.73 - 1.76

Optical Data:

Biaxial (-), a=1.72, b=1.741, g=1.746, bire=0.0260

Calculated Properties of Hodgkinsonite

Electron Density:

Bulk Density (Electron Density)=3.74 gm/cc
note: Specific Gravity of Hodgkinsonite =3.91 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Hodgkinsonite}= 25.90 barns/electron
U=PE_{Hodgkinsonite} x rElectron Density= 96.77 barns/cc.

Radioactivity:

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

Hodgkinsonite Classification

Dana Class:

52.02.01.03 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.02)with cations in [4] and >[4] coordination

(52.02.01)Euclase group

52.02.01.01 Euclase BeAlSiO4(OH) P 2₁/a 2/m

52.02.01.02 Clinohedrite CaZnSiO4•(H2O) Aa m

52.02.01.03 Hodgkinsonite MnZn2SiO4(OH)2 P 2₁/c 2/m

52.02.01.04 Gerstmannite (Mg,Mn)2ZnSiO4(OH)2 Bbam 2/m 2/m 2/m

Strunz Class:

09.AE.20 09 - SILICATES (Germanates)

09.A - Nesosilicates

09.AE -Nesosilicates with additional (O,OH,F,H2O);

09.AE.20 Hodgkinsonite MnZn2SiO4(OH)2 P 2₁/c 2/m

Other Hodgkinsonite Information

References:

NAME( Dana8) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Hodgkinsonite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - Franklin Minerals(Palache)
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - MinMax(Deutsch)
14 - MinMax(English)
15 - Mineralienatlas (Deutsch)
16 - Minerals of Franklin and Sterling Hill
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST

Search for Hodgkinsonite using:

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

Visit our Advertisers for Hodgkinsonite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Hodgkinsonite Mineral Data :

Ask about Hodgkinsonite 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 Hodgkinsonite Specimen Label here :

Hodgkinsonite

MnZn2SiO4(OH)2
Dana No: 52.02.01.03 Strunz No: 09.AE.20
Locality:

Notes: