Strunzite Mineral Data

Strunzite Mineral Data +

[Welcome] [Newest Minerals] [Gallery] [About Us] [How to Buy]
We are www.minernet.it, an Italian company which deals rare, unusual,
and showy mineral specimens. We specialise in minerals from Tsumeb,
Mont Saint Hilaire, Bolivia and Major Italian sites.

General Strunzite Information

Chemical Formula:

Mn++Fe+++2(PO4)2(OH)2·6(H2O)

Composition:

Molecular Weight = 498.68 gm

Manganese 11.02 % Mn 14.23 % MnO

Iron 22.40 % Fe 32.02 % Fe₂O₃

Phosphorus 12.42 % P 28.46 % P₂O₅

Hydrogen 2.83 % H 25.29 % H₂O

Oxygen 51.33 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺Fe³⁺₂(PO₄)₂(OH)₂·6(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

Hangedor Pegmatite, Oberfalz, Bavaria, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Hugo Strunz (1910-), mineralogist, Berlin, who authored the Strunz system of mineral classification.

Synonym:

ICSD 100409

PDF 11-133

Strunzite Image

Images:

Strunzite

Comments: Acicular, stellate sprays of strunzite crystals on matrix.
Location: Palermo #1 mine, North Groton, Grafton County, New Hampshire, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Strunzite Crystallography

Axial Ratios:

a:b:c =1.0397:1:0.7404

Cell Dimensions:

a = 10.228, b = 9.837, c = 7.284, Z = 2; alpha = 90.17°, beta = 98.44°, gamma = 117.44° V = 643.37 Den(Calc)= 2.57

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 9.02(1), 5.32(0.8), 4.35(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

Fanfani L , Tomassini M , Zanazzi P F , Zanzari A R , Tschermaks Mineralogische und Petrographische Mitteilungen , 25 (1978) p.77-87, The crystal structure of strunzite, a contribution to the, crystal chemistry of basic ferric-manganous hydrated phosphates, Locality: Big Chief mine, Glendale, South Dakota

Physical Properties of Strunzite

Cleavage:

[???] Good

Color:

Brownish yellow, Golden yellow, Straw yellow.

Density:

2.47 - 2.56, Average = 2.51

Diaphaniety:

Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

light yellow

Optical Properties of Strunzite

Gladstone-Dale:

CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.024 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2606,KPDmeas= 0.2663,KC= 0.267

Optical Data:

Biaxial (-), a=1.619, b=1.67, g=1.72, bire=0.1010, 2V(Calc)=86, 2V(Meas)=75-80.

Pleochroism (x):

pale yellow.

Pleochroism (y):

pale yellow.

Pleochroism (z):

yellow.

Calculated Properties of Strunzite

Electron Density:

r_electron=2.51 gm/cc
note: r_Strunzite=2.52 gm/cc.

Fermion Index

Fermion Index = 0.00499
Boson Index = 0.99501

Photoelectric:

PE_Strunzite= 9.93 barns/electron
U=PE_Strunzite x r_electron= 24.94 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Strunzite is Not Radioactive

Strunzite Classification

Dana Class:

42.11.9.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.11)where (AB)4 (XO4)3 Zq · x(H2O)

(42.11.9)Dana Group

42.11.9.1 Strunzite MnFe2(PO4)2(OH)2·6(H2O) P1 1

42.11.9.2 Ferrostrunzite FeFe2(PO4)2(OH)2·6(H2O) P 1,P1 Tri

42.11.9.3 Ferristrunzite FeFe2(PO4)2(OH)3·5(H2O) P1,P 1 Tri

Strunz Class:

VII/D.11-20 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.11 - Strunzite series

VII/D.11-10 Ferrostrunzite FeFe2(PO4)2(OH)2·6(H2O) P 1,P1 Tri

VII/D.11-20 Strunzite MnFe2(PO4)2(OH)2·6(H2O) P1 1

VII/D.11-30 Ferristrunzite FeFe2(PO4)2(OH)3·5(H2O) P1,P 1 Tri

VII/D.11-40 Bermanite MnMn2(PO4)2(OH)2·4(H2O) P 2₁ 2

VII/D.11-50 Cacoxenite (Fe,Al)25(PO4)17O6(OH)12·75(H2O) P 6/mmm 6/m 2/m 2/m

VII/D.11-60 Tinticite Fe5(PO4,VO4)4·7(H2O) P1 1

VII/D.11-70 Beraunite FeFe5(PO4)4(OH)5·4(H2O) C 2/c 2/m

VII/D.11-71 Oxiberaunite* (Fe,Mn)Fe5(PO4)4O(OH)4·6(H2O) Mono

VII/D.11-90 Souzalite (Mg,Fe)3(Al,Fe)4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

VII/D.11-100 Gormanite Fe3Al4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

VII/D.11-110 Dufrenite FeFe4(PO4)3(OH)5·2(H2O) C 2/c 2/m

VII/D.11-120 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12·4(H2O) C 2/c 2/m

VII/D.11-130 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6·2(H2O) C 2/c 2/m

VII/D.11-135 Ercitite! Na(Mn,Fe)(PO4)(OH)·2(H2O) P 2₁/n 2/m

VII/D.11-140 Kidwellite Na(Fe,Cu)9x(PO4)6(OH)11·3(H2O) P 2/c 2/m

VII/D.11-150 Meurigite! KFe7(PO4)5(OH)7·8(H2O) C 2,Cm,C 2/m Mono

Other Strunzite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Strunzite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

Search for Strunzite using:

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

Visit our Advertisers for Strunzite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Strunzite Mineral Data :

Ask about Strunzite 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 Strunzite Specimen Label here :

Strunzite

Mn++Fe+++2(PO4)2(OH)2·6(H2O)
Dana No: 42.11.9.1 Strunz No: VII/D.11-20
Locality:

Notes: