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Cranswickite

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About CranswickiteHide

Lachlan M.D. Cranswick
Formula:
MgSO4 · 4H2O
Crystal System:
Monoclinic
Name:
The name is in honour of Lachlan M.D. Cranswick (1968–2010) who helped to develop and maintain the Collaborative Computational Project No. 14 in Powder and Small Molecule Single Crystal Diffraction (CCP14). Lachlan was expert in powder X-ray and neutron diffraction using the Rietveld method. http://journals.iucr.org/j/issues/2010/05/01/es0383/index.html
Dimorph of:
Closely related to starkeyite.
Formerly referred to as "β-Starkeyite"


Classification of CranswickiteHide

Approved
Approval Year:
2010
7.CB.15

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
B : With only medium-sized cations
29.6.6.7

29 : HYDRATED ACID AND NORMAL SULFATES
6 : AXO4·xH2O

Chemical Properties of CranswickiteHide

Formula:
MgSO4 · 4H2O
IMA Formula:
Mg(SO4) · 4H2O

Crystallography of CranswickiteHide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Setting:
Cc
Cell Parameters:
a = 11.9172(4) Å, b = 5.1704(1) Å, c = 12.1880(3) Å
β = 117.538(2)°
Ratio:
a:b:c = 2.305 : 1 : 2.357
Unit Cell V:
665.90 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.284 (100)
4.62 (33)
3.983 (25)
3.940 (49)
3.176 (50)
3.127 (24)
2.575 (26)
1.952 (22)

Type Occurrence of CranswickiteHide

Place of Conservation of Type Material:
Royal Ontario Museum, Toronto, Ontario, Canada, accession number 55368

Synonyms of CranswickiteHide

Related Minerals - Nickel-Strunz GroupingHide

7.CB.05Dwornikite(Ni,Fe)SO4 · H2OMon. 2/m : B2/b
7.CB.05GunningiteZnSO4 · H2OMon. 2/m : B2/b
7.CB.05KieseriteMgSO4 · H2OMon. 2/m
7.CB.05Poitevinite(Cu,Fe)SO4 · H2OTric.
7.CB.05SzmikiteMnSO4 · H2OMon.
7.CB.05SzomolnokiteFeSO4 · H2OMon. 2/m : B2/b
7.CB.05CobaltkieseriteCoSO4 · H2OMon. 2/m : B2/b
7.CB.07SanderiteMgSO4 · 2H2OOrth. 2 2 2 : P21 21 21
7.CB.10BonattiteCuSO4 · 3H2OMon.
7.CB.15Aplowite(Co,Mn,Ni)SO4 · 4H2OMon. 2/m
7.CB.15Boyleite(Zn,Mg)SO4 · 4H2OMon. 2/m : P21/b
7.CB.15Ilesite(Mn,Zn,Fe)SO4 · 4H2OMon. 2/m
7.CB.15RozeniteFeSO4 · 4H2OMon. 2/m : P21/b
7.CB.15StarkeyiteMgSO4 · 4H2OMon. 2/m : P21/b
7.CB.15DrobeciteCdSO4 · 4H2OMon. 2/m : P21/m
7.CB.20ChalcanthiteCuSO4 · 5H2OTric. 1 : P1
7.CB.20JôkokuiteMnSO4 · 5H2OTric.
7.CB.20PentahydriteMgSO4 · 5H2OTric.
7.CB.20SiderotilFeSO4 · 5H2OTric.
7.CB.25Bianchite(Zn,Fe)SO4 · 6H2OMon. 2/m : P2/m
7.CB.25Chvaleticeite(Mn,Mg)SO4 · 6H2OMon. 2/m : B2/b
7.CB.25FerrohexahydriteFeSO4 · 6H2OMon. 2/m : B2/b
7.CB.25HexahydriteMgSO4 · 6H2OMon. 2/m : P2/m
7.CB.25Moorhouseite(Co,Ni,Mn)SO4 · 6H2OMon.
7.CB.25Nickelhexahydrite(Ni,Mg,Fe)SO4 · 6H2OMon.
7.CB.30RetgersiteNiSO4 · 6H2OTet. 4 2 2 : P41 21 2
7.CB.35BieberiteCoSO4 · 7H2OMon. 2/m : P2/m
7.CB.35BoothiteCuSO4 · 7H2OMon.
7.CB.35MallarditeMnSO4 · 7H2OMon. 2/m : P2/m
7.CB.35MelanteriteFe2+(H2O)6SO4 · H2OMon. 2/m : P21/b
7.CB.35Zincmelanterite(Zn,Cu,Fe)SO4 · 7H2OMon.
7.CB.35Alpersite(Mg,Cu)[SO4] · 7H2OMon. 2/m : P21/b
7.CB.40EpsomiteMgSO4 · 7H2OOrth. 2 2 2 : P21 21 21
7.CB.40GoslariteZnSO4 · 7H2OOrth. 2 2 2 : P21 21 21
7.CB.40MorenositeNiSO4 · 7H2OOrth. 2 2 2 : P21 21 21
7.CB.45AlunogenAl2(SO4)3 · 17H2OTric. 1
7.CB.45Meta-alunogenAl2(SO4)3 · 12H2O
7.CB.50AluminocoquimbiteFeAl(SO4)3 · 9H2OTrig. 3m (3 2/m) : P3 1c
7.CB.55CoquimbiteFe2-xAlx(SO4)3 · 9H2O, x ~0.5Trig. 3m (3 2/m) : P3 1c
7.CB.55ParacoquimbiteFe2(SO4)3 · 9H2OTrig. 3 : R3
7.CB.55Rhomboclase(H5O2)Fe3+(SO4)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma
7.CB.60KorneliteFe2(SO4)3 · 7H2OMon. 2/m : P21/m
7.CB.65QuenstedtiteFe2(SO4)3 · 11H2OTric. 1 : P1
7.CB.70LauseniteFe2(SO4)3·5H2OMon. 2/m : P21/m
7.CB.75LishizheniteZnFe2(SO4)4 · 14H2OTric. 1 : P1
7.CB.75RömeriteFe2+Fe3+2(SO4)4 · 14H2OTric. 1 : P1
7.CB.80RansomiteCuFe2(SO4)4 · 6H2OMon. 2/m : P21/b
7.CB.85ApjohniteMn2+Al2(SO4)4 · 22H2OMon.
7.CB.85BíliniteFe2+Fe3+2(SO4)4 · 22H2OMon. 2/m : P21/b
7.CB.85Dietrichite(Zn,Fe2+,Mn2+)Al2(SO4)4 · 22H2OMon. 2/m : P21/b
7.CB.85HalotrichiteFeAl2(SO4)4 · 22H2OMon. 2 : P2
7.CB.85PickeringiteMgAl2(SO4)4 · 22H2OMon. 2/m : P21/b
7.CB.85Redingtonite(Fe2+,Mg,Ni)(Cr,Al)2(SO4)4·22H2OMon.
7.CB.85Wupatkiite(Co,Mg,Ni)Al2(SO4)4·22H2OMon.
7.CB.90MeridianiiteMgSO4 · 11H2OTric. 1 : P1

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

29.6.6.1RozeniteFeSO4 · 4H2OMon. 2/m : P21/b
29.6.6.2StarkeyiteMgSO4 · 4H2OMon. 2/m : P21/b
29.6.6.3Ilesite(Mn,Zn,Fe)SO4 · 4H2OMon. 2/m
29.6.6.4Aplowite(Co,Mn,Ni)SO4 · 4H2OMon. 2/m
29.6.6.5Boyleite(Zn,Mg)SO4 · 4H2OMon. 2/m : P21/b
29.6.6.8MeridianiiteMgSO4 · 11H2OTric. 1 : P1

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 CranswickiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
ZVMO 128(4), 99 (1999) [American Mineralogist 85, 1564 (2000)(abstract)]
Peterson, R. C. (2010). Cranswickite, IMA 2010-016. CNMNC Newsletter, August 2010, page 798; Mineralogical Magazine 74, 797-800.
Peterson, R. C. (2011) Cranswickite MgSO4·4H2O, a new mineral from Calingasta, Argentina. American Mineralogist, 96, 869-877.

Internet Links for CranswickiteHide

Localities for CranswickiteHide

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.
Argentina (TL)
 
  • San Juan
    • Calingasta Department
Peterson (2010)
        • Sierra del Tontal
Ron C. Peterson (2011) Cranswickite MgSO4.4H2O, a new mineral from Calingasta, Argentina
Mineral and/or Locality  
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