Bjarebyite Mineral Data

Bjarebyite Mineral Data +

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

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
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 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: