[New Updates] [Gallery 1] [Gallery 2] [Gallery 3] [Rock Shop Gallery] Serving the mineral collector and educator community since 1970 Over 900,000 mineral specimens in stock New minerals acquired weekly - Wright's Rock Shop General Acuminite InformationSrAlF4(OH)•(H2O) |
Molecular Weight = 225.62 gm |
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Strontium 38.84 % Sr 45.93 % SrO |
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Aluminum 11.96 % Al 22.60 % Al2O3 |
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Hydrogen 1.34 % H 11.98 % H2O |
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Oxygen 14.18 % O |
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Fluorine 33.68 % F 33.68 % F |
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F -14.18 % -O=F2 |
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100.00 % 100.00 % = TOTAL OXIDE |
SrAlF4(OH)•(H2O) |
In the Ivigtut cryolite deposit, southwestern Greenland. |
Approved IMA 1987 |
Greenland, Ivigtut Link to MinDat.org Location Data. |
From the Latin acuminis, sharp point, for spear head, the characteristic shape of the crystals. |
Acuminite + Pronunciation |
ICSD 33830 |
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PDF 48-1870 |
| | Search for Acuminite Images
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| | Acuminite Crystallographya:b:c =2.5551:1:2.7538 |
a = 13.223, b = 5.175, c = 14.251, Z = 8; beta = 111.61° V = 906.64 Den(Calc)= 3.31 |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c |
By Intensity(I/Io): 3.5049(1), 4.7058(1), 4.7674(1), |
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Mouse
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| Physical Properties of Acuminite{???} Perfect |
Colorless. |
3.295 |
Transparent |
3.5 - Copper Penny |
Vitreous (Glassy) |
white |
| Optical Properties of AcuminiteBiaxial (+), a=1.4507, b=1.4528, g=1.4624-1.4627, bire=0.0117-0.0120, 2V(Calc)=50-52, 2V(Meas)=46-57. |
| Calculated Properties of AcuminiteBulk Density (Electron Density)=3.11 gm/cc |
note: Specific Gravity of Acuminite =3.31 gm/cc. Fermion Index = 0.02 |
Boson Index = 0.98 PEAcuminite = 44.23 barns/electron |
U=PEAcuminite x rElectron Density= 137.56 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Acuminite is Not Radioactive | Acuminite Classification11.06.17.01 (11)Halide Complexes; Alumino-fluorides |
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(11.06)with miscellaneous formulae |
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(11.06.17)Dana Group |
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03.CC.10 03 - HALIDES |
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03.C - Complex Halides |
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03.CC -Soro-aluminofluorides |
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| Other Acuminite InformationNAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.73,p1492,1988) OPTIC PROP.(Am.Min.,Vol.73,p1492,1988) |
Links to other databases for Acuminite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Acuminite using: Visit our Advertisers for Acuminite : B & L Fine MineralsCrystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Acuminite Mineral Data : Ask about Acuminite here : Print or Cut-and-Paste your Acuminite Specimen Label here :
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