Norbergite Mineral Data

Norbergite Mineral Data +

[Localities] [Carat Weight] [Special Collections] [Diamond Lots] [Ordering Info]
See Also: [Excalibur Minerals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Special Collections of Rough Diamonds for Researchers and Collectors
Unparalled diversity of specimens from different locations

General Norbergite Information

Chemical Formula:

Mg3(SiO4)(F,OH)2

Composition:

Molecular Weight = 202.00 gm

Magnesium 36.10 % Mg 59.86 % MgO

Silicon 13.90 % Si 29.74 % SiO₂

Hydrogen 0.25 % H 2.23 % H₂O

Oxygen 35.64 % O

Fluorine 14.11 % F 14.11 % F

- % F -5.94 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₃(SiO₄)F_1.5(OH)_0.5

IMA Status:

Valid Species (Pre-IMA) 1926

Locality:

Ostanmosoa iron mine, Norberg, Vastmanland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Synonym:

ICSD 15203

PDF 11-686

Norbergite Image

Images:

Norbergite

Comments: Numerous orange to orange-brown dipyramidal crystals of norbergite in white matrix.
Location: Piukkala, Near Pargas, Finland. Scale: 2.1 X 2.7 cm.
© John Veevaert

Images:

Norbergite

Comments: Yellow orange norbergite inclustions in white marble (calcite)..
Location: Oakssaung Hill, Mogok, Mandalay Myanmar. Scale: Crystal size 5 mm.
© Fabre Minerals

Norbergite Crystallography

Axial Ratios:

a:b:c =1.8553:1:2.1702

Cell Dimensions:

a = 8.72, b = 4.7, c = 10.2, Z = 4; V = 418.04 Den(Calc)= 3.21

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

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

By Intensity(I/I_o): 3.058(1), 2.23(0.8), 2.639(0.75),

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

Gibbs G V , Ribbe P H , American Mineralogist , 54 (1969) p.376-390, The crystal structures of the humite minerals: I. Norbergite

View Additional jPOWD Structure files for Norbergite
[1] [2]

Physical Properties of Norbergite

Cleavage:

[???] Distinct

Color:

White, Yellow, Brown, Red.

Density:

3.1 - 3.2, Average = 3.15

Diaphaniety:

Transparent to translucent

Fracture:

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

Hardness:

6-6.5 - Orthoclase-Pyrite

Luminescence:

Fluorescent.

Luster:

Vitreous - Resinous

Streak:

white

Optical Properties of Norbergite

Gladstone-Dale:

CI meas= 0.07 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.088 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1786,KPDmeas= 0.182,KC= 0.1958

Optical Data:

Biaxial (+), a=1.563, b=1.567, g=1.59, bire=0.0270

Calculated Properties of Norbergite

Electron Density:

r_electron=3.12 gm/cc
note: r_Norbergite=3.15 gm/cc.

Fermion Index

Fermion Index = 0.04276
Boson Index = 0.95724

Photoelectric:

PE_Norbergite= 1.41 barns/electron
U=PE_Norbergite x r_electron= 4.40 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Norbergite is Not Radioactive

Norbergite Classification

Dana Class:

52.3.2a.1 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.3)with cations in [6] coordination only

(52.3.2a)Humite group

52.3.2a.1 Norbergite Mg3(SiO4)(F,OH)2 P nma 2/m 2/m 2/m

Strunz Class:

VIII/B.04-10 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6]

VIII/B.04 - Humite group

VIII/B.04-10 Norbergite Mg3(SiO4)(F,OH)2 P nma 2/m 2/m 2/m

VIII/B.04-20 Chondrodite (Mg,Fe)5(SiO4)2(F,OH)2 P 2₁/c 2/m

VIII/B.04-30 Humite (Mg,Fe)7(SiO4)3(F,OH)2 P nma 2/m 2/m 2/m

VIII/B.04-40 Clinohumite (Mg,Fe)9(SiO4)4(F,OH)2 P 2₁/c 2/m

VIII/B.04-42 Hydroxylclinohumite! Mg9(SiO4)4(OH,F)2 P 2₁/c 2/m

VIII/B.04-50 Ribbeite (Mn,Mg)5(SiO4)2(OH)2 P nma 2/m 2/m 2/m

VIII/B.04-60 Alleghanyite Mn5(SiO4)2(OH)2 P 2₁/a 2/m

VIII/B.04-70 Reinhardbraunsite Ca5(SiO4)2(OH,F)2 P 2₁/a 2/m

VIII/B.04-80 Manganhumite (Mn,Mg)7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m

VIII/B.04-90 Leucophoenicite Mn7(SiO4)3(OH)2 P 2₁/a 2/m

VIII/B.04-100 Jerrygibbsite (Mn,Zn)9(SiO4)4(OH)2 Pbn21 mm2

VIII/B.04-110 Sonolite Mn9(SiO4)4(OH,F)2 P 2₁/a 2/m

Other Norbergite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

Search for Norbergite using:

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

Visit our Advertisers for Norbergite :
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 Norbergite Mineral Data :

Ask about Norbergite 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 Norbergite Specimen Label here :

Norbergite

Mg3(SiO4)(F,OH)2
Dana No: 52.3.2a.1 Strunz No: VIII/B.04-10
Locality:

Notes: