Palenzonaite Mineral Data

Palenzonaite Mineral Data +

[Express Minerals] [Minerals for Sale] [About Us] [En EspaÃƒï¿½Ã‚Â±ol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

General Palenzonaite Information

Chemical Formula:

(Ca,Na)3Mn++(V+++++,As+++++,Si)3O12

Composition:

Molecular Weight = 517.63 gm

Sodium 4.44 % Na 5.99 % Na₂O

Calcium 15.49 % Ca 21.67 % CaO

Manganese 10.61 % Mn 13.70 % MnO

Vanadium 17.71 % V 31.62 % V₂O₅

Silicon 1.63 % Si 3.48 % SiO₂

Arsenic 13.03 % As 19.98 % As₂O₅

Oxygen 37.09 % O

______ ______

100.00 % 96.45 % = TOTAL OXIDE

Empirical Formula:

Ca₂NaMn²⁺3(VO₄)_0.63(AsO₄)_0.33(SiO₄)_0.1

Environment:

Narrow veinlets cutting a manganese deposit hosted within radiolarian cherts.

IMA Status:

Approved IMA 1987

Locality:

Molinello manganese mine, near Chiavari, Val Graveglia, Liguria, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for Andrea Palenzona, amateur mineralogist and discoverer of the mineral.

Synonym:

ICSD 67441

PDF 41-608

Palenzonaite Image

Images:

Palenzonaite

Comments: Dark reddish-brown palenzonaite.
Location: Molinello Mine, Val Graveglia, Liguria, Italy. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Palenzonaite Crystallography

Cell Dimensions:

a = 12.534, Z = 8; V = 1,969.11 Den(Calc)= 3.49

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I a3d

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

By Intensity(I/I_o): 2.803(1), 2.558(0.6), 3.132(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

Basso R , Neues Jahrbuch fur Mineralogie, Monatshefte , 1987 (1987) p.136-144, The crystal structure of palenzonaite, a new vanadate garnet from, Val Graveglia (Northern Apennines, Italy), Locality: Val Graveglia, Northern Apennines, Italy

Physical Properties of Palenzonaite

Cleavage:

None

Color:

Wine red.

Density:

3.63

Diaphaniety:

Transparent to Translucent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

5-5.5 - Apatite-Knife Blade

Luster:

Adamantine

Streak:

brownish red

Optical Properties of Palenzonaite

Gladstone-Dale:

CI meas= -0.151 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.197 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2765,KPDmeas= 0.2658,KC= 0.231

Optical Data:

Isotropic, n=1.965.

Calculated Properties of Palenzonaite

Electron Density:

r_electron=3.47 gm/cc
note: r_Palenzonaite=3.63 gm/cc.

Fermion Index

Fermion Index = 0.00159
Boson Index = 0.99841

Photoelectric:

PE_Palenzonaite= 17.10 barns/electron
U=PE_Palenzonaite x r_electron= 59.32 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Palenzonaite is Not Radioactive

Palenzonaite Classification

Dana Class:

38.2.1.3 (38)Anhydrous Phosphates, etc

(38.2)(A+ B++)5 (XO4)3

(38.2.1)Dana Group

38.2.1.1 Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m

38.2.1.2 Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m

38.2.1.3 Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m

38.2.1.4 Schaferite! NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m

Strunz Class:

VII/A.08-50 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na

VII/A.08 - Chladniite - Berzeliite - Palenzonaite series

VII/A.08-03 Galileiite! NaFe4(PO4)3 R 3 3

VII/A.08-05 Chladniite Na2Ca(Mg,Fe)7(PO4)6 R 3 3

VII/A.08-10 Johnsomervilleite Na2Ca(Mg,Fe,Mn)7(PO4)6 R 3 3

VII/A.08-20 Fillowite Na2Ca(Mn,Fe)7(PO4)6 R 3 3

VII/A.08-30 Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m

VII/A.08-40 Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m

VII/A.08-45 Schaferite! NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m

VII/A.08-50 Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m

Other Palenzonaite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.73,p930,1988) OPTIC PROP.(Am.Min.,Vol.73,p930,1988)

See Also:

Links to other databases for Palenzonaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

Search for Palenzonaite using:

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

Visit our Advertisers for Palenzonaite :
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 Palenzonaite Mineral Data :

Ask about Palenzonaite 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 Palenzonaite Specimen Label here :

Palenzonaite

(Ca,Na)3Mn++(V+++++,As+++++,Si)3O12
Dana No: 38.2.1.3 Strunz No: VII/A.08-50
Locality:

Notes: