For K+ = M+, the crystals consist of  anions together with fluoride that does not coordinate to Ta(V).
fɔːɹ kˈeɪ plˈʌs ˈiːkwəlz ˈɛm plˈʌs, ðə kɹˈɪstəlz kənsˈɪst ʌv ˈænaɪənz təɡˌɛðɚ wɪð flˈʊɹɹaɪd ðæt dʌznˌɑːt koʊˈɔːɹdɪnˌeɪt tə tˈɑː vˈiː.