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Crawfordite

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Formula:
Na3Sr(CO3)(PO4)
Colour:
Colourless
Lustre:
Vitreous
Hardness:
3
Crystal System:
Monoclinic
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


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Classification of CrawforditeHide

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·

Pronounciation of CrawforditeHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of CrawforditeHide

Vitreous
Colour:
Colourless
Streak:
White
Hardness:

Optical Data of CrawforditeHide

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 CrawforditeHide

Formula:
Na3Sr(CO3)(PO4)
IMA Formula:
Na3Sr(PO4)(CO3)

Crystallography of CrawforditeHide

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

Type Occurrence of CrawforditeHide

Synonyms of CrawforditeHide

Other Language Names for CrawforditeHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Aegirine1 photo of Crawfordite associated with Aegirine on mindat.org.
Nepheline1 photo of Crawfordite associated with Nepheline on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.BF.05FerrotychiteNa6(Fe,Mn,Mg)2(CO3)4(SO4)
5.BF.05ManganotychiteNa6Mn2(CO3)4(SO4)
5.BF.05NorthupiteNa3Mg(CO3)2ClIso. m3 (2/m 3) : Fd3
5.BF.05TychiteNa6Mg2(CO3)4(SO4)Iso. m3 (2/m 3) : Fd3
5.BF.10BonshtedtiteNa3Fe2+(CO3)(PO4)Mon. 2/m : P21/m
5.BF.10BradleyiteNa3Mg(CO3)(PO4)Mon.
5.BF.10SidorenkiteNa3Mn2+(CO3)(PO4)Mon.
5.BF.15Daqingshanite-(Ce)(Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2xTrig.
5.BF.20Reederite-(Y)(Na,Mn)15Y2(CO3)9(FSO3)ClHex. 6 : P6
5.BF.25Mineevite-(Y)Na25Ba(Y,Gd,Dy)2(CO3)11(HCO3)4(SO4)2F2ClHex.
5.BF.30BrianyoungiteZn3(CO3,SO4)(OH)4Mon. 2/m : P21/m
5.BF.35PhilolithitePb12Mn2+(Mg,Mn2+)2(Mn2+,Mg)4(CO3)4(SO4)O6(OH)12Cl4Tet. 4/mmm (4/m 2/m 2/m)
5.BF.40LeadhillitePb4(CO3)2(SO4)(OH)2Mon. 2/m : P21/b
5.BF.40MacphersonitePb4(CO3)2(SO4)(OH)2Orth. mmm (2/m 2/m 2/m)
5.BF.40SusannitePb4(CO3)2(SO4)(OH)2Trig. 3 : P3

Related Minerals - Dana Grouping (8th Ed.)Hide

43.2.1.1BradleyiteNa3Mg(CO3)(PO4)Mon.
43.2.1.2SidorenkiteNa3Mn2+(CO3)(PO4)Mon.
43.2.1.3BonshtedtiteNa3Fe2+(CO3)(PO4)Mon. 2/m : P21/m

Other InformationHide

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 CrawforditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
New Minerals (1997), New Minerals 1990-1994.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 123(3): 107-111.

Internet Links for CrawforditeHide

Localities for CrawforditeHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Northern Region
    • Murmanskaya Oblast'
      • 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  
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