Goedkenite Mineral Data

Goedkenite Mineral Data +

General Goedkenite Information

Chemical Formula:

(Sr,Ca)2Al(PO4)2(OH)

Composition:

Molecular Weight = 385.40 gm

Strontium 34.10 % Sr 40.33 % SrO

Calcium 5.20 % Ca 7.28 % CaO

Aluminum 7.00 % Al 13.23 % Al₂O₃

Phosphorus 16.07 % P 36.83 % P₂O₅

Hydrogen 0.26 % H 2.34 % H₂O

Oxygen 37.36 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Sr_1.5Ca_0.5Al(PO₄)₂(OH)

IMA Status:

Approved IMA 1975

Locality:

Palermo pegmatite, North Groton, Grafton County, New Hampshire, USA Link to MinDat.org Location Data.

Name Origin:

Named for V. L. Goedken.

Goedkenite Image

Images:

Goedkenite

Comments: Clear, pointed goedkenite crystals epitaxially overgrown on palermoite.
Location: Palermo #1 mine, North Groton, Grafton County, New Hampshire, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Goedkenite Crystallography

Axial Ratios:

a:b:c =1.4721:1:1.2648

Cell Dimensions:

a = 8.45, b = 5.74, c = 7.26, Z = 2; beta = 113.7° V = 322.43 Den(Calc)= 3.97

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): 3.061(1), 2.585(0.7), 2.841(0.6),

Physical Properties of Goedkenite

Cleavage:

[100] Good

Color:

Colorless, Light yellow.

Density:

3.83

Diaphaniety:

Transparent

Hardness:

5 - Apatite

Luster:

Vitreous - Adamantine

Streak:

white

Optical Properties of Goedkenite

Gladstone-Dale:

CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1708,KPDmeas= 0.177,KC= 0.1765

Optical Data:

Biaxial (+), a=1.669, b=1.673, g=1.692, bire=0.0230, 2V(Calc)=50, 2V(Meas)=45-50.

Calculated Properties of Goedkenite

Electron Density:

r_electron=3.64 gm/cc
note: r_Goedkenite=3.83 gm/cc.

Fermion Index

Fermion Index = 0.02412
Boson Index = 0.97588

Photoelectric:

PE_Goedkenite= 39.61 barns/electron
U=PE_Goedkenite x r_electron= 144.08 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Goedkenite is Not Radioactive

Goedkenite Classification

Dana Class:

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

(41.10)where (A++ B++)3 (XO4)2 Zq

(41.10.4)Dana Group

41.10.4.1 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 2₁/m 2/m

41.10.4.2 Bearthite Ca2Al(PO4)2(OH) P 2₁/m 2/m

41.10.4.3 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 2₁/m 2/m

41.10.4.4 Tokyoite! Ba2Mn(VO4)2(OH) P 2₁/m 2/m

Strunz Class:

VII/B.24-10 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.24 - Brackebuschite - Tsumebite group, Bearthite - Jamesite series

VII/B.24-05 Bearthite Ca2Al(PO4)2(OH) P 2₁/m 2/m

VII/B.24-10 Goedkenite (Sr,Ca)2Al(PO4)2(OH) P 2₁/m 2/m

VII/B.24-20 Gamagarite Ba2(Fe,Mn)(VO4)2(OH) P 2₁/m 2/m

VII/B.24-22 Tokyoite! Ba2Mn(VO4)2(OH) P 2₁/m 2/m

VII/B.24-25 Bushmakinite! Pb2Al(PO4)(VO4)(OH) P 2₁/m 2/m

VII/B.24-28 Calderonite! Pb2Fe(VO4)2(OH) P 2₁/m 2/m

VII/B.24-30 Brackebuschite Pb2(Mn,Fe)(VO4)2(OH) P 2₁/m 2/m

VII/B.24-40 Arsenbrackebuschite Pb2(Fe,Zn)(AsO4)2·(H2O) P 2₁/m 2/m

VII/B.24-45 Feinglosite! Pb2(Zn,Fe)[(As,S)O4]2·(H2O) P 2₁,P 2₁/m Mono

VII/B.24-50 Tsumebite Pb2Cu(PO4)(SO4)(OH) P 2₁/m 2/m

VII/B.24-60 Arsentsumebite Pb2Cu(AsO4)(SO4)(OH) P 2₁/m 2/m

VII/B.24-65 Lulzacite! Sr2Fe(Fe,Mg)2Al4(PO4)4(OH)10 P1 1

VII/B.24-70 Jamesite Pb2Zn2Fe5(AsO4)5O4 P1 1

Other Goedkenite Information

References:

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

See Also:

Links to other databases for Goedkenite :
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 Goedkenite using:

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

Visit our Advertisers for Goedkenite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
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
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Goedkenite Mineral Data :

Ask about Goedkenite 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 Goedkenite Specimen Label here :

Goedkenite

(Sr,Ca)2Al(PO4)2(OH)
Dana No: 41.10.4.1 Strunz No: VII/B.24-10
Locality:

Notes: