Bjarebyite Mineral Data

Bjarebyite Mineral Data +

[Newest Minerals] [Minerals for Sale] [Tsumeb Mine] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa and Mastercard are Welcome

General Bjarebyite Information

Chemical Formula:

(Ba,Sr)(Mn++,Fe++,Mg)2Al2(PO4)3(OH)3

Composition:

Molecular Weight = 648.89 gm

Barium 23.28 % Ba 25.99 % BaO

Strontium 1.35 % Sr 1.60 % SrO

Magnesium 0.75 % Mg 1.24 % MgO

Manganese 7.62 % Mn 9.84 % MnO

Aluminum 7.48 % Al 14.14 % Al₂O₃

Iron 7.75 % Fe 9.96 % FeO

Phosphorus 14.32 % P 32.81 % P₂O₅

Hydrogen 0.47 % H 4.16 % H₂O

Oxygen 36.98 % O

______ ______

100.00 % 99.75 % = TOTAL OXIDE

Empirical Formula:

Ba_1.1Sr_0.1Al_1.8Mn²⁺_0.9Fe²⁺_0.9Mg_0.2(PO₄)₃(OH)₃

Environment:

Late-stage reaction product of triphylite and amblygonite in complex granite pegmatites.

IMA Status:

Approved IMA 1973

Locality:

Palermo #1 mine, near North Groton, Grafton County, New Hampshire, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Alfred Gunnar Bjareby (1899-1967), Swedish-American student of New England pegmatite minerals.

Synonym:

ICSD 6207

PDF 29-171

Bjarebyite Image

Images:

Bjarebyite

Comments: Green, pyramidal crystals of bjarebyite.
Location: Palermo No. 1 mine, North Groton, Grafton County, New Hamphshire, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Bjarebyite Crystallography

Axial Ratios:

a:b:c =0.7396:1:0.4072

Cell Dimensions:

a = 8.93, b = 12.073, c = 4.917, Z = 2; beta = 100.15° V = 521.81 Den(Calc)= 4.13

Crystal System:

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

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

By Intensity(I/I_o): 3.09(1), 2.681(0.7), 8.81(0.7),

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

Moore P B , Araki T , American Mineralogist , 59 (1974) p.567-572, Bjarebyite, Ba(Mn,Fe)2Al2(OH)3[PO4]3: Its atomic arrangement

Physical Properties of Bjarebyite

Cleavage:

[010] Perfect, [100] Perfect

Color:

Emerald green.

Density:

4.02

Diaphaniety:

Transparent to Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Hardness:

4 - Fluorite

Luster:

Subadamantine

Streak:

white

Optical Properties of Bjarebyite

Gladstone-Dale:

CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.058 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1692,KPDmeas= 0.1739,KC= 0.1797

Optical Data:

Biaxial (+), a=1.692, b=1.695, g=1.71, bire=0.0180, 2V(Calc)=50, 2V(Meas)=35.

Pleochroism (x):

colorless or pale brownish yellow.

Pleochroism (y):

brownish green.

Pleochroism (z):

olive green or apple green.

Calculated Properties of Bjarebyite

Electron Density:

r_electron=3.78 gm/cc
note: r_Bjarebyite=4.02 gm/cc.

Fermion Index

Fermion Index = 0.045
Boson Index = 0.955

Photoelectric:

PE_Bjarebyite= 106.11 barns/electron
U=PE_Bjarebyite x r_electron= 401.13 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bjarebyite is Not Radioactive

Bjarebyite Classification

Dana Class:

41.9.1.3 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.9)where (A B)5 (XO4)3 Zq

(41.9.1)Dana Group

41.9.1.1 Kulanite Ba(Fe,Mn,Mg)2Al2(PO4)3(OH)3 P 2₁/m 2/m

41.9.1.2 Penikisite BaMg2Al2(PO4)3(OH)3 P1 1

41.9.1.3 Bjarebyite (Ba,Sr)(Mn,Fe,Mg)2Al2(PO4)3(OH)3 P 2₁/m 2/m

41.9.1.4 Perloffite Ba(Mn,Fe)2Fe2(PO4)3(OH)3 P 2₁/m 2/m

41.9.1.5 Johntomaite! Ba(Fe,Ca,Mn)2Fe2(PO4)3(OH)3 P 2₁/m 2/m

Strunz Class:

VII/B.29-30 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.29 - Bjarebyite group

VII/B.29-10 Penikisite BaMg2Al2(PO4)3(OH)3 P1 1

VII/B.29-20 Kulanite Ba(Fe,Mn,Mg)2Al2(PO4)3(OH)3 P 2₁/m 2/m

VII/B.29-30 Bjarebyite (Ba,Sr)(Mn,Fe,Mg)2Al2(PO4)3(OH)3 P 2₁/m 2/m

VII/B.29-35 Johntomaite! Ba(Fe,Ca,Mn)2Fe2(PO4)3(OH)3 P 2₁/m 2/m

VII/B.29-40 Perloffite Ba(Mn,Fe)2Fe2(PO4)3(OH)3 P 2₁/m 2/m

VII/B.29-50 Jagowerite BaAl2(PO4)2(OH)2 P1 1

VII/B.29-60 Vesignieite Cu3Ba(VO4)2(OH)2 C 2/m 2/m

VII/B.29-70 Drugmanite Pb2(Fe,Al)H(PO4)2(OH)2 P 2₁/a 2/m

VII/B.29-80 Mounanaite PbFe2(VO4)2(OH)2 P1 1

Other Bjarebyite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)

See Also:

Links to other databases for Bjarebyite :
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 Bjarebyite using:

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

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

Translate Bjarebyite Mineral Data :

Ask about Bjarebyite 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 Bjarebyite Specimen Label here :

Bjarebyite

(Ba,Sr)(Mn++,Fe++,Mg)2Al2(PO4)3(OH)3
Dana No: 41.9.1.3 Strunz No: VII/B.29-30
Locality:

Notes: