Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Crawfordite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
Na3Sr(CO3)(PO4)
System:
Monoclinic
Colour:
Colourless
Lustre:
Vitreous
Hardness:
3
Name:
Named in 1994 by Alexander Petrovich Khomyakov, L. I. Polezhaeva, and E. V. Sokolova in honor of Sir Adair Crawford [1748 Crumlin, County Antrim, Northern Ireland, United Kingdom - July 29, 1795 Lymington, England, United Kingdom] professor of chemistry at the Royal Military Academy, London, England as well as a staff physician at St. Thomas Hospital, also in London. He researched and made many contributions to calorimetry and specific heats. He was co-discoverer of strontium.
Found in hyperagpaitic pegmatites

Classification of Crawfordite

Approved
5.BF.10

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
43.2.1.4

43 : COMPOUND PHOSPHATES, ETC.
2 : Anhydrous Normal Compound Phosphates, etc·
mindat.org URL:
http://www.mindat.org/min-1148.html
Please feel free to link to this page.

Type Occurrence of Crawfordite

Year of Discovery:
1994

Physical Properties of Crawfordite

Vitreous
Colour:
Colourless
Streak:
White
Hardness (Mohs):
3

Crystallography of Crawfordite

Crystal System:
Monoclinic
Cell Parameters:
a = 9.18Å, b = 6.7Å, c = 5.27Å
β = 89.98°
Ratio:
a:b:c = 1.37 : 1 : 0.787
Unit Cell Volume:
V 324.14 ų (Calculated from Unit Cell)

Optical Data of Crawfordite

Type:
Biaxial (-)
RI values:
nα = 1.520 nβ = 1.564 nγ = 1.565
2V:
Measured: 20° , Calculated: 16°
Max Birefringence:
δ = 0.045
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
not discernible

Chemical Properties of Crawfordite

Formula:
Na3Sr(CO3)(PO4)
Essential elements:
All elements listed in formula:

Relationship of Crawfordite to other Species

5.BF.05FerrotychiteNa6(Fe,Mn,Mg)2(CO3)4(SO4)
5.BF.05ManganotychiteNa6Mn2(CO3)4(SO4)
5.BF.05NorthupiteNa3Mg(CO3)2Cl
5.BF.05TychiteNa6Mg2(CO3)4(SO4)
5.BF.10BonshtedtiteNa3Fe2+(CO3)(PO4)
5.BF.10BradleyiteNa3Mg(CO3)(PO4)
5.BF.10SidorenkiteNa3Mn2+(CO3)(PO4)
5.BF.15Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x
5.BF.20Reederite-(Y)(Na,Mn)15Y2(CO3)9(FSO3)Cl
5.BF.25Mineevite-(Y)Na25Ba(Y,Gd,Dy)2(CO3)11(HCO3)4(SO4)2F2Cl
5.BF.30BrianyoungiteZn3(CO3,SO4)(OH)4
5.BF.35PhilolithitePb12Mn2+(Mg,Mn2+)2(Mn2+,Mg)4(CO3)4(SO4)O6(OH)12Cl4
5.BF.40LeadhillitePb4(CO3)2(SO4)(OH)2
5.BF.40MacphersonitePb4(CO3)2(SO4)(OH)2
5.BF.40SusannitePb4(CO3)2(SO4)(OH)2

Other Names for Crawfordite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Crawfordite

Reference List:
New Minerals (1997), New Minerals 1990-1994.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 123(3): 107-111.

Internet Links for Crawfordite

Localities for Crawfordite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Russia (TL)
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
          • Koashva Mt
[MinRec 27:202]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: July 4, 2015 21:57:16 Page generated: July 4, 2015 14:06:53