General Fermorite Information
|
Chemical Formula: |
(Ca,Sr)5(AsO4,PO4)3(OH) |
Composition: |
Molecular Weight = 707.27 gm |
| |
Strontium 24.78 % Sr 29.30 % SrO |
| |
Calcium 17.00 % Ca 23.79 % CaO |
| |
Arsenic 26.48 % As 40.62 % As2O5 |
| |
Phosphorus 2.19 % P 5.02 % P2O5 |
| |
Hydrogen 0.14 % H 1.27 % H2O |
| |
Oxygen 29.41 % O |
| |
______ ______ |
| |
100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Ca3Sr2(AsO4)2.5(PO4)0.5(OH) |
IMA Status: |
Valid Species (Pre-IMA) 1911 |
Locality: |
Link to MinDat.org Location Data. |
Synonym: |
ICSD 71351 |
| |
PDF 14-215 |
| |
Fermorite Image |
Images:
|
|
Fermorite Crystallography
|
Axial Ratios: |
a:c = 1:0.73089 |
Cell Dimensions: |
a = 9.55, c = 6.98, Z = 2; V = 551.31 Den(Calc)= 4.26 |
Crystal System: |
Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m |
X Ray Diffraction: |
By Intensity(I/Io): 2.86(1), 2.75(0.6), 3.49(0.5), |
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
|
|
|
Hughes J M , Drexler J W , Neues Jahrbuch fur Mineralogie, Monatshefte , 1991 (1991) p.327-336, Cation substitution in the apatite tetrahedral site:, crystal structures of type hydroxylellestadtite and type fermorite, Locality: Sitipar deposit, India
|
|
| |
Physical Properties of Fermorite
|
Cleavage: |
None |
Color: |
White, Light pink. |
Density: |
3.518 |
Diaphaniety: |
Translucent |
Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
Hardness: |
5 - Apatite |
Luster: |
Greasy (Oily) |
Streak: |
white |
| |
Optical Properties of Fermorite
|
Gladstone-Dale: |
CI meas= -0.088 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.101 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1543,KPDmeas= 0.1869,KC= 0.1718 |
Optical Data: |
Uniaxial (-), e=1.655, w=1.66, bire=0.0050. |
| |
Calculated Properties of Fermorite
|
Electron Density: |
relectron=3.29 gm/cc note: rFermorite =3.52 gm/cc. |
Fermion Index |
Fermion Index = 0.01771 Boson Index = 0.98229 |
Photoelectric: |
PEFermorite = 48.61 barns/electron U=PEFermorite x relectron= 160.06 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Fermorite is Not Radioactive |
| |
Fermorite Classification
|
Dana Class: |
41.8.3.4 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen |
| |
(41.8)where (A)5 (XO4)3 Zq |
| |
(41.8.3)Dana Group |
| |
41.8.3.1 Svabite Ca5(AsO4)3F P 63/m 6/m |
| |
41.8.3.2 Turneaureite Ca5[(As,P)O4]3Cl P 63/m 6/m |
| |
41.8.3.3 Johnbaumite Ca5(AsO4)3(OH) P 63/m,P 63 Hex |
| |
41.8.3.4 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 63/m 6/m |
Strunz Class: |
VII/B.39-90 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.39 - Apatite - Pyromorphite group |
| |
VII/B.39-10 Fluorapatite Ca5(PO4)3F P 63/m 6/m |
| |
VII/B.39-20 Chlorapatite Ca5(PO4)3Cl P 63/m 6/m |
| |
VII/B.39-30 Hydroxylapatite Ca5(PO4)3(OH) P 63/m 6/m |
| |
VII/B.39-40 Carbonate-hydroxylapatite Ca5(PO4,CO3)3(OH) P 63/m 6/m |
| |
VII/B.39-50 Carbonate-fluorapatite Ca5(PO4,CO3)3F P 63/m 6/m |
| |
VII/B.39-60 Svabite Ca5(AsO4)3F P 63/m 6/m |
| |
VII/B.39-70 Turneaureite Ca5[(As,P)O4]3Cl P 63/m 6/m |
| |
VII/B.39-80 Johnbaumite Ca5(AsO4)3(OH) P 63/m,P 63 Hex |
| |
VII/B.39-90 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 63/m 6/m |
| |
VII/B.39-95 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 63 6 |
| |
VII/B.39-100 Strontium-apatite (Sr,Ca)5(PO4)3(F,OH) P 63/m 6/m |
| |
VII/B.39-110 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3 |
| |
VII/B.39-115 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3 |
| |
VII/B.39-117 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3 |
| |
VII/B.39-120 Alforsite Ba5(PO4)3Cl P 63/m 6/m |
| |
VII/B.39-130 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 63/m,P 63 Hex |
| |
VII/B.39-140 Hedyphane Ca2Pb3(AsO4)3Cl P 63/m 6/m |
| |
VII/B.39-150 Pyromorphite Pb5(PO4)3Cl P 63/m 6/m |
| |
VII/B.39-160 Mimetite Pb5(AsO4)3Cl P 63/m 6/m |
| |
VII/B.39-165 Clinomimetite Pb5(AsO4)3Cl P 21/b 2/m |
| |
VII/B.39-170 Vanadinite Pb5(VO4)3Cl P 63/m 6/m |
| |
Other Fermorite 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 Fermorite :
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 - Mineral and Gemstone Kingdom
11 -Mineralienatlas (Deutsch)
12 -QUT Mineral Atlas
13 - WWW-MINCRYST
14 -École des Mines de Paris
Search for Fermorite using:
[ALTAVISTA]
[AOL]
[About.com]
[All-The-Web]
[HotBot]
[Ixquick]
[LookSmart]
[MAMMA]
[MSN.COM]
[Netscape]
[Teoma]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Fermorite :
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 Fermorite Mineral Data :
Ask about Fermorite 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 Fermorite Specimen Label here :
|
Fermorite
(Ca,Sr)5(AsO4,PO4)3(OH)
Dana No: 41.8.3.4 Strunz No: VII/B.39-90
Locality:
Notes:
|
|
| |
| |
|
| |