Appendix B: Extinction symbols and corresponding space groups

Extinction Symbol Space Groups
Monoclinic
P – 1 1 P211(3), Pm11(6), P2/m11(10)
P 21 1 1 P2111(4), P21/m11(11)
P b 1 1 Pb11(7), P2/b11(13)
P 21/b 1 1 P21/b11(14)
P c 1 1 Pc11(7), P2/c11(13)
P 21/c 1 1 P21/c11(14)
P n 1 1 Pn11(7), P2/n11(13)
P 21/n 1 1 P21/n11(14)
C – 1 1 C211(5), Cm11(8), C2/m11(12)
C n 1 1 Cn11(9), C2/n11(15)
B – 1 1 B211(5), Bm11(8), B2/m11(12)
B b 1 1 Bb11(9), B2/b11(15)
I – 1 1 I211(5), Im11(8), I2/m11(12)
I c 1 1 Ic11(9), I2/c11(15)
P 1 – 1 P2(3), Pm(6), P2/m(10)
P 1 21 1 P21(4), P21/m(11)
P 1 a 1 Pa(7), P2/a(13)
P 1 21/a 1 P21/a(14)
P 1 c 1 Pc(7), P2/c(13)
P 1 21/c 1 P21/c(14)
P 1 n 1 Pn(7), P2/n(13)
P 1 21/n 1 P21/n(14)
C 1 – 1 C2(5), Cm(8), C2/m(12)
C 1 c 1 Cc(9), C2/c(15)
A 1 – 1 A2(5), Am(8), A2/m(12)
A 1 n 1 An(9), A2/n(15)
I 1 – 1 I2(5), Im(8), I2/m(12)
I 1 a 1 Ia(9), I2/a(15)
P 1 1 – P112(3), P11m(6), P112/m(10)
P 1 1 21 P1121(4), P1121/m(11)
P 1 1 a P11a(7), P112/a(13)
P 1 1 21/a P1121/a(14)
P 1 1 b P11b(7), P112/b(13)
P 1 1 21/b P1121/b(14)
P 1 1 n P11n(7), P112/n(13)
P 1 1 21/n P1121/n(14)
B 1 1 – B112(5), B11m(8), B112/m(12)
B 1 1 n B11n(9), B112/n(15)
A 1 1 – A112(5), A11m(8), A112/m(12)
A 1 1 a A11a(9), A112/a(15)
I 1 1 – I112(5), I11m(8), I112/m(12)
I 1 1 b I11b(9), I112/b(15)
Orthorhombic
P – – – P222(16), Pmm2(25), Pmmm(47), Pm2m(25), P2mm(25)
P – – 21 P2221(17)
P – 21 – P2212(17)
P – 21 21 P22121(18)
P 21 – – P2122(17)
P 21 – 21 P21221(18)
P 21 21 – P21212(18)
P 21 21 21 P212121(19)
P – – a Pm2a(28), P21ma(26), Pmma(51)
P – – b Pm21b(26), P2mb(28), Pmmb(51)
P – – n Pm21n(31), P21mn(31), Pmmn(59)
P – a – Pma2(28), Pmam(51), P21am(26)
P – a a P2aa(27), Pmaa(49)
P – a b P21ab(29), Pmab(57)
P – a n P2an(30), Pman(53)
P – c – Pmc21(26), P2cm(28), Pmcm(51)
P – c a P21ca(29), Pmca(57)
P – c b P2cb(32), Pmcb(55)
P – c n P21cn(33), Pmcn(62)
P – n – Pmn21(31), P21nm(31), Pmnm(59)
P – n a P2na(30), Pmna(53)
P – n b P21nb(33), Pmnb(62)
P – n n P2nn(34), Pmnn(58)
P b – – Pbm2(28), Pb21m(26), Pbmm(51)
P b – a Pb21a(29), Pbma(57)
P b – b Pb2b(27), Pbmb(49)
P b – n Pb2n(30), Pbmn(53)
P b a – Pba2(32), Pbam(55)
P b a a Pbaa(54)
P b a b Pbab(54)
P b a n Pban(50)
P b c – Pbc21(29), Pbcm(57)
P b c a Pbca(61)
P b c b Pbcb(54)
P b c n Pbcn(60)
P b n – Pbn21(33), Pbnm(62)
P b n a Pbna(60)
P b n b Pbnb(56)
P b n n Pbnn(52)
P c – – Pcm21(26), Pc2m(28), Pcmm(51)
P c – a Pc2a(32), Pcma(55)
P c – b Pc21b(29), Pcmb(57)
P c – n Pc21n(33), Pcmn(62)
P c a – Pca21(29), Pcam(57)
P c a a Pcaa(54)
P c a b Pcab(61)
P c a n Pcan(60)
P c c – Pcc2(27), Pccm(49)
P c c a Pcca(54)
P c c b Pccb(54)
P c c n Pccn(56)
P c n – Pcn2(30), Pcnm(53)
P c n a Pcna(50)
P c n b Pcnb(60)
P c n n Pcnn(52)
P n – – Pnm21(31), Pnmm(59), Pn21m(31)
P n – a Pn21a(33), Pnma(62)
P n – b Pn2b(30), Pnmb(53)
P n – n Pn2n(34), Pnmn(58)
P n a – Pna21(33), Pnam(62)
P n a a Pnaa(56)
P n a b Pnab(60)
P n a n Pnan(52)
P n c – Pnc2(30), Pncm(53)
P n c a Pnca(60)
P n c b Pncb(50)
P n c n Pncn(52)
P n n – Pnn2(34), Pnnm(58)
P n n a Pnna(52)
P n n b Pnnb(52)
P n n n Pnnn(48)
C – – – C222(21), Cmm2(35), Cmmm(65), Cm2m(38), C2mm(38)
C – – 21 C2221(20)
C – – (ab) Cm2a(39), Cmma(67), C2mb(39), Cmmb(67)
C – c – Cmc21(36), Cmcm(63), C2cm(40)
C – c (ab) C2cb(41), Cmca(64)
C c – – Ccm21(36), Ccmm(63), Cc2m(40)
C c – (ab) Cc2a(41), Ccmb(64)
C c c – Ccc2(37), Cccm(66)
C c c (ab) Ccca(68), Cccb(68)
B – – – B222(21), Bmm2(38), Bmmm(65), Bm2m(35), B2mm(38)
B – 21 – B2212(20)
B – – b Bm21b(36), Bmmb(63), B2mb(40)
B – (ac)- Bma2(39), Bmam(67), B2cm(39), Bmcm(67)
B – (ac)b B2cb(41), Bmab(64)
B b – – Bbm2(40), Bbmm(63), Bb21m(36)
B b – b Bb2b(37), Bbmb(66)
B b (ac)- Bba2(41), Bbcm(64)
B b (ac)b Bbab(68), Bbcb(68)
A – – – A222(21), Amm2(38), Ammm(65), Am2m(38), A2mm(35)
A 21 – – A2122(20)
A – – a Am2a(40), Amma(63), A21ma(36)
A – a – Ama2(40), Amam(63), A21am(36)
A – a a A2aa(37), Amaa(66)
A(bc)- – Abm2(39), Abmm(67), Ac2m(39), Acmm(67)
A(bc)- a Ac2a(41), Abma(64)
A(bc)a – Aba2(41), Acam(64)
A(bc)a a Abaa(68), Acaa(68)
I – – – I222(23), Imm2(44), Immm(71), I212121(24), Im2m(44), I2mm(44)
I – – (ab) Im2a(46), Imma(74), I2mb(46), Immb(74)
I – (ac)- Ima2(46), Imam(74), I2cm(46), Imcm(74)
I – c b I2cb(45), Imcb(72)
I(bc)- – Ibm2(46), Ibmm(74), Ic2m(46), Icmm(74)
I c – a Ic2a(45), Icma(72)
I b a – Iba2(45), Ibam(72)
I b c a Ibca(73)
F – – – F222(22), Fmm2(42), Fmmm(69), Fm2m(42), F2mm(42)
F – d d F2dd(43)
F d – d Fd2d(43)
F d d – Fdd2(43)
F d d d Fddd(70)
Tetragonal
P – – – P4(75), P-4(81), P4/m(83), P422(89), P4mm(99), P-42m(111), P4/mmm(123), P-4m2(115)
P – 21 – P4212(90), P-421m(113)
P 42 – – P42(77), P42/m(84), P4222(93)
P 42 21 – P42212(94)
P 41 – – P41(76), P43(78), P4122(91), P4322(95)
P 41 21 – P41212(92), P43212(96)
P – – c P42mc(105), P-42c(112), P42/mmc(131)
P – 21 c P-421c(114)
P – b – P4bm(100), P-4b2(117), P4/mbm(127)
P – b c P42bc(106), P42/mbc(135)
P – c – P42cm(101), P-4c2(116), P42/mcm(132)
P – c c P4cc(103), P4/mcc(124)
P – n – P42nm(102), P-4n2(118), P42/mnm(136)
P – n c P4nc(104), P4/mnc(128)
P n – – P4/n(85), P4/nmm(129)
P 42/n – – P42/n(86)
P n – c P42/nmc(137)
P n b – P4/nbm(125)
P n b c P42/nbc(133)
P n c – P42/ncm(138)
P n c c P4/ncc(130)
P n n – P42/nnm(134)
P n n c P4/nnc(126)
I – – – I4(79), I-4(82), I4/m(87), I422(97), I4mm(107), I-42m(121), I4/mmm(139), I-4m2(119)
I 41 – – I41(80), I4122(98)
I – – d I41md(109), I-42d(122)
I – c – I4cm(108), I-4c2(120), I4/mcm(140)
I – c d I41cd(110)
I 41/a – – I41/a(88)
I a – d I41/amd(141)
I a c d I41/acd(142)
Trigonal / Hexagonal
P – – – P3(143), P-3(147), P321(150), P3m1(156), P-3m1(164), P312(149), P31m(157), P-31m(162), P6(168), P-6(174), P6/m(175), P622(177), P6mm(183), P-62m(189), P6/mmm(191), P-6m2(187)
P 31 – – P31(144), P3121(152), P3112(151), P32(145), P3221(154), P3212(153)
P – – c P31c(159), P-31c(163), P63mc(186), P-62c(190), P63/mmc(194)
P – c – P3c1(158), P-3c1(165), P63cm(185), P-6c2(188), P63/mcm(193)
R (obv) – – R3(146), R-3(148), R32(155), R3m(160), R-3m(166)
R (obv)- – c R3c(161), R-3c(167)
R (rev) – – R3(146), R-3(148), R32(155), R3m(160), R-3m(166)
R (rev)- – c R3c(161), R-3c(167)
R – – R3(146), R-3(148), R32(155), R3m(160), R-3m(166)
R – c R3c(161), R-3c(167)
P 63 – – P63(173), P63/m(176), P6322(182)
P 62 – – P62(171), P6222(180), P64(172), P6422(181)
P 61 – – P61(169), P6122(178), P65(170), P6522(179)
P – – c P6cc(184), P6/mcc(192)
P – c c P23(195), Pm-3(200), P432(207), P-43m(215), Pm-3m(221)
Cubic
P – – – P213(198)
P 21(42) – – P4232(208)
P 41 – – P4132(213), P4332(212)
P – – n P-43n(218), Pm-3n(223)
P a – – Pa-3(205)
P n – – Pn-3(201), Pn-3m(224)
P n – n Pn-3n(222)
I – – – I23(197), I213(199), Im-3(204), I432(211), I-43m(217), Im-3m(229)
I 41 – – I4132(214)
I – – d I-43d(220)
I a – – Ia-3(206)
I a – d Ia-3d(230)
F – – – F23(196), Fm-3(202), F432(209), F-43m(216), Fm-3m(225)
F 41 – – F4132(210)
F – – c F-43c(219), Fm-3c(226)
F d – – Fd-3(203), Fd-3m(227)
F d – c Fd-3c(228)
P – P1(1), P-1(2)